subroutine ch_cap ( c ) !*****************************************************************************80 ! !! CH_CAP capitalizes a single character. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 19 July 1998 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input/output, character C, the character to capitalize. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character c integer itemp itemp = ichar ( c ) if ( 97 <= itemp .and. itemp <= 122 ) then c = char ( itemp - 32 ) end if return end function ch_eqi ( c1, c2 ) !*****************************************************************************80 ! !! CH_EQI is a case insensitive comparison of two characters for equality. ! ! Example: ! ! CH_EQI ( 'A', 'a' ) is TRUE. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 28 July 2000 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character C1, C2, the characters to compare. ! ! Output, logical CH_EQI, the result of the comparison. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character c1 character c1_cap character c2 character c2_cap logical ch_eqi c1_cap = c1 c2_cap = c2 call ch_cap ( c1_cap ) call ch_cap ( c2_cap ) if ( c1_cap == c2_cap ) then ch_eqi = .true. else ch_eqi = .false. end if return end subroutine ch_to_digit ( c, digit ) !*****************************************************************************80 ! !! CH_TO_DIGIT returns the value of a base 10 digit. ! ! Example: ! ! C DIGIT ! --- ----- ! '0' 0 ! '1' 1 ! ... ... ! '9' 9 ! ' ' 0 ! 'X' -1 ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 04 August 1999 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character C, the decimal digit, '0' through '9' or blank ! are legal. ! ! Output, integer DIGIT, the corresponding value. If C was ! 'illegal', then DIGIT is -1. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character c integer digit if ( lle ( '0', c ) .and. lle ( c, '9' ) ) then digit = ichar ( c ) - 48 else if ( c == ' ' ) then digit = 0 else digit = -1 end if return end subroutine fem_data_read ( node_coord_file_name, element_file_name, & node_data_file_name, dim_num, node_num, element_num, element_order, & node_data_num, node_coord, element_node, node_data ) !*****************************************************************************80 ! !! FEM_DATA_READ reads data from a set of FEM files. ! ! Discussion: ! ! This program reads the node, element and data files that define ! a finite element geometry and data based on that geometry: ! * a set of nodes, ! * a set of elements based on those nodes, ! * a set of data values associated with each node. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 02 March 2006 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) NODE_COORD_FILE_NAME, the name of the node ! coordinate file. If this argument is not supplied, the program terminates. ! ! Input, character ( len = * ) ELEMENT_FILE_NAME, the name of the element ! file. ! ! Input, character ( len = * ) NODE_DATA_FILE_NAME, the name of the node ! data file. ! ! Input, integer DIM_NUM, the spatial dimension. ! ! Input, integer NODE_NUM, the number of nodes. ! ! Input, integer ELEMENT_NUM, the number of elements. ! ! Input, integer ELEMENT_ORDER, the order of the elements. ! ! Input, integer NODE_DATA_NUM, the number of data items ! per node. ! ! Output, real ( kind = rk ) NODE_COORD(DIM_NUM,NODE_NUM), the coordinates ! of nodes. ! ! Output, integer ELEMENT_NODE(ELEMENT_ORDER,ELEMENT_NUM); ! the global index of local node I in element J. ! ! Output, real ( kind = rk ) NODE_DATA(NODE_DATA_NUM,NODE_NUM), the data ! values associated with each node. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer dim_num integer element_num integer element_order integer node_data_num integer node_num character ( len = * ) element_file_name integer element_node(element_order,element_num) real ( kind = rk ) node_coord(dim_num,node_num) character ( len = * ) node_coord_file_name real ( kind = rk ) node_data(node_data_num,node_num) character ( len = * ) node_data_file_name if ( len_trim ( node_coord_file_name ) <= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FEM_DATA_READ - Fatal error!' write ( *, '(a)' ) ' No node coordinate file name was supplied!' stop 1 end if call r8mat_data_read ( node_coord_file_name, dim_num, node_num, node_coord ) if ( 0 < len_trim ( element_file_name ) ) then call i4mat_data_read ( element_file_name, element_order, & element_num, element_node ) end if if ( 0 < len_trim ( node_data_file_name ) ) then call r8mat_data_read ( node_data_file_name, node_data_num, node_num, & node_data ) end if return end subroutine fem_header_print ( dim_num, node_num, element_num, & element_order, node_data_num ) !*****************************************************************************80 ! !! FEM_HEADER_PRINT prints the header to set of FEM files. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 03 March 2006 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, integer DIM_NUM, the spatial dimension. ! ! Input, integer NODE_NUM, the number of nodes. ! ! Input, integer ELEMENT_NUM, the number of elements. ! ! Input, integer ELEMENT_ORDER, the order of the elements. ! ! Input, integer NODE_DATA_NUM, the number of data items ! per node. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer dim_num integer element_num integer element_order integer node_data_num integer node_num write ( *, '(a)' ) ' ' write ( *, '(a,i8)' ) ' Spatial dimension = ', dim_num write ( *, '(a,i8)' ) ' Number of nodes = ', node_num write ( *, '(a,i8)' ) ' Number of elements = ', element_num write ( *, '(a,i8)' ) ' Element order = ', element_order write ( *, '(a,i8)' ) ' Number of node data items = ', node_data_num return end subroutine fem_header_read ( node_coord_file_name, element_file_name, & node_data_file_name, dim_num, node_num, element_num, element_order, & node_data_num ) !*****************************************************************************80 ! !! FEM_HEADER_READ reads the sizes of arrays in a set of FEM files. ! ! Discussion: ! ! This program reads the node, element and data files that define ! a finite element geometry and data based on that geometry: ! * a set of nodes, ! * a set of elements based on those nodes, ! * a set of data values associated with each node. ! and returns the sizes DIM_NUM, NODE_NUM, ELEMENT_NUM, ELEMENT_ORDER, ! and NODE_DATA_NUM required to allocate space for these arrays. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 01 March 2006 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) NODE_COORD_FILE_NAME, the name of the node ! coordinate file. If this argument is not supplied, the program terminates. ! ! Input, character ( len = * ) ELEMENT_FILE_NAME, the name of the element ! file. ! ! Input, character ( len = * ) NODE_DATA_FILE_NAME, the name of the node ! data file. ! ! Output, integer DIM_NUM, the spatial dimension, inferred from ! the "shape" of the data in the node file. ! ! Output, integer NODE_NUM, the number of nodes, inferred from ! the number of lines of data in the node coordinate file. ! ! Output, integer ELEMENT_NUM, the number of elements, inferred ! from the number of lines of data in the element file. ! ! Output, integer ELEMENT_ORDER, the order of the elements, ! inferred from the number of items in the first line of the element file. ! ! Output, integer NODE_DATA_NUM, the number of data items per ! node, inferred from the number of items in the first line of the node ! data file. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer dim_num character ( len = * ) element_file_name integer element_num integer element_order character ( len = * ) node_coord_file_name character ( len = * ) node_data_file_name integer node_data_num integer node_num integer node_num2 if ( len_trim ( node_coord_file_name ) <= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FEM_HEADER_READ - Fatal error!' write ( *, '(a)' ) ' No node coordinate file name was supplied!' stop 1 end if if ( len_trim ( element_file_name ) <= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FEM_HEADER_READ:' write ( *, '(a)' ) ' No element file name was supplied.' write ( *, '(a)' ) ' No element data will be returned.' end if if ( len_trim ( node_data_file_name ) <= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FEM_HEADER_READ:' write ( *, '(a)' ) ' No node data file name was supplied!' write ( *, '(a)' ) ' No node data will be returned.' end if ! ! Read the node coordinate file. ! call r8mat_header_read ( node_coord_file_name, dim_num, node_num ) if ( 0 < len_trim ( element_file_name ) ) then call i4mat_header_read ( element_file_name, element_order, element_num ) else element_order = 0 element_num = 0 end if if ( 0 < len_trim ( node_data_file_name ) ) then call r8mat_header_read ( node_data_file_name, node_data_num, node_num2 ) if ( node_num2 /= node_num ) then write ( *, '(a)' ) ' ' write ( *, '(a,i6)' ) & ' The number of nodes in the node coordinate file is ', node_num write ( *, '(a,i6)' ) & ' The number of nodes in the node data file is ', node_num2 write ( *, '(a)' ) ' Because of this, no node data will be stored.' node_data_num = 0 end if else node_data_num = 0 end if return end subroutine fem_write ( node_coord_file_name, element_file_name, & node_data_file_name, dim_num, node_num, element_num, element_order, & node_data_num, node_coord, element_node, node_data ) !*****************************************************************************80 ! !! FEM_WRITE writes data files associated with a finite element solution. ! ! Discussion: ! ! This program writes the node, element and data files that define ! a finite element geometry and data based on that geometry: ! * a set of nodes, ! * a set of elements based on those nodes, ! * a set of data values associated with each node. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 01 March 2006 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) NODE_COORD_FILE_NAME, the name of the node ! coordinate file. If this argument is empty, no node coordinate file will ! be written. ! ! Input, character ( len = * ) ELEMENT_FILE_NAME, the name of the element ! file. If this argument is empty, no element file will be written. ! ! Input, character ( len = * ) NODE_DATA_FILE_NAME, the name of the node ! data file. If this argument is empty, no node data file will be written. ! ! Input, integer DIM_NUM, the spatial dimension. ! ! Input, integer NODE_NUM, the number of nodes. ! ! Input, integer ELEMENT_NUM, the number of elements. ! ! Input, integer ELEMENT_ORDER, the order of the elements. ! ! Input, integer NODE_DATA_NUM, the number of data items ! per node. ! ! Input, real ( kind = rk ) NODE_COORD(DIM_NUM,NODE_NUM), the coordinates ! of nodes. ! ! Input, integer ELEMENT_NODE(ELEMENT_ORDER,ELEMENT_NUM); ! the global index of local node I in element J. ! ! Input, real ( kind = rk ) NODE_DATA(NODE_DATA_NUM,NODE_NUM), the data ! values associated with each node. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer dim_num integer element_num integer element_order integer node_data_num integer node_num character ( len = * ) element_file_name integer element_node(element_order,element_num) real ( kind = rk ) node_coord(dim_num,node_num) character ( len = * ) node_coord_file_name real ( kind = rk ) node_data(node_data_num,node_num) character ( len = * ) node_data_file_name ! ! Write the node coordinate file. ! if ( 0 < len_trim ( node_coord_file_name ) ) then call r8mat_write ( node_coord_file_name, dim_num, node_num, node_coord ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FEM_WRITE wrote node coordinates to "' & // trim ( node_coord_file_name ) // '".' end if ! ! Write the element file. ! if ( 0 < len_trim ( element_file_name ) ) then call i4mat_write ( element_file_name, element_order, element_num, & element_node ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FEM_WRITE wrote element data to "' // & trim ( element_file_name ) // '".' end if ! ! Write the node data file. ! if ( 0 < len_trim ( node_data_file_name ) ) then call r8mat_write ( node_data_file_name, node_data_num, node_num, node_data ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FEM_WRITE wrote node data to "' & // trim ( node_data_file_name ) // '".' end if return end subroutine file_column_count ( file_name, column_num ) !*****************************************************************************80 ! !! FILE_COLUMN_COUNT counts the number of columns in the first line of a file. ! ! Discussion: ! ! The file is assumed to be a simple text file. ! ! Most lines of the file are presumed to consist of COLUMN_NUM words, ! separated by spaces. There may also be some blank lines, and some ! comment lines, which have a "#" in column 1. ! ! The routine tries to find the first non-comment non-blank line and ! counts the number of words in that line. ! ! If all lines are blanks or comments, it goes back and tries to analyze ! a comment line. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 21 June 2001 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) FILE_NAME, the name of the file. ! ! Output, integer COLUMN_NUM, the number of columns in the file. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer column_num character ( len = * ) file_name logical got_one integer ios integer iunit character ( len = 255 ) line ! ! Open the file. ! call get_unit ( iunit ) open ( unit = iunit, file = file_name, status = 'old', form = 'formatted', & access = 'sequential', iostat = ios ) if ( ios /= 0 ) then column_num = -1 write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FILE_COLUMN_COUNT - Fatal error!' write ( *, '(a)' ) ' Could not open the file:' write ( *, '(4x,a)' ) '"' // trim ( file_name ) // '".' return end if ! ! Read one line, but skip blank lines and comment lines. ! got_one = .false. do read ( iunit, '(a)', iostat = ios ) line if ( ios /= 0 ) then exit end if if ( len_trim ( line ) == 0 ) then cycle end if if ( line(1:1) == '#' ) then cycle end if got_one = .true. exit end do if ( .not. got_one ) then rewind ( iunit ) do read ( iunit, '(a)', iostat = ios ) line if ( ios /= 0 ) then exit end if if ( len_trim ( line ) == 0 ) then cycle end if got_one = .true. exit end do end if close ( unit = iunit ) if ( .not. got_one ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FILE_COLUMN_COUNT - Warning!' write ( *, '(a)' ) ' The file does not seem to contain any data.' column_num = -1 return end if call s_word_count ( line, column_num ) return end subroutine file_name_specification ( node_coord_file_name, & element_file_name, node_data_file_name ) !*****************************************************************************80 ! !! FILE_NAME_SPECIFICATION determines the names of the input files. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 01 March 2006 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input/output, character ( len = * ) NODE_COORD_FILE_NAME, the name of ! the node coordinate file, if the user supplied it on the command line. ! ! Input/output, character ( len = * ) ELEMENT_FILE_NAME(*), the name ! of the element file, if the user supplied it on the command line. ! ! Input/output, character ( len = * ) NODE_DATA_FILE_NAME(*), the name ! of the node data file, if the user supplied it on the command line. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character ( len = * ) element_file_name character ( len = * ) node_coord_file_name character ( len = * ) node_data_file_name if ( 0 < len_trim ( node_coord_file_name ) ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Please enter the name of the node coordinate file.' read ( *, '(a)' ) node_coord_file_name end if if ( 0 < len_trim ( element_file_name ) ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Please enter the name of the element file.' read ( *, '(a)' ) element_file_name end if if ( 0 < len_trim ( node_data_file_name ) ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) ' Please enter the name of the node data file.' read ( *, '(a)' ) node_data_file_name end if return end subroutine file_row_count ( file_name, line_num ) !*****************************************************************************80 ! !! FILE_ROW_COUNT counts the number of rows in a file. ! ! Discussion: ! ! The file is assumed to be a simple text file. ! ! Blank lines and comment lines, which begin with '#', are not counted. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 21 June 2001 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) FILE_NAME, the name of the file. ! ! Output, integer LINE_NUM, the number of lines found ! in the file. ! If the file could not be opened, then LINE_NUM is returned as -1. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character ( len = * ) file_name integer ios integer iunit character ( len = 255 ) line integer line_num logical, parameter :: verbose = .false. line_num = 0 ! ! Open the file. ! call get_unit ( iunit ) open ( unit = iunit, file = file_name, status = 'old', form = 'formatted', & access = 'sequential', iostat = ios ) if ( ios /= 0 ) then line_num = -1 if ( verbose ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'FILE_ROW_COUNT - Fatal error!' write ( *, '(a)' ) ' Could not open the file:' write ( *, '(4x,a)' ) '"' // trim ( file_name ) // '".' end if return end if ! ! Count the lines. ! do read ( iunit, '(a)', iostat = ios ) line if ( ios /= 0 ) then exit end if if ( len_trim ( line ) == 0 ) then cycle end if if ( line(1:1) == '#' ) then cycle end if line_num = line_num + 1 end do close ( unit = iunit ) return end subroutine get_unit ( iunit ) !*****************************************************************************80 ! !! GET_UNIT returns a free FORTRAN unit number. ! ! Discussion: ! ! A "free" FORTRAN unit number is an integer between 1 and 99 which ! is not currently associated with an I/O device. A free FORTRAN unit ! number is needed in order to open a file with the OPEN command. ! ! If IUNIT = 0, then no free FORTRAN unit could be found, although ! all 99 units were checked (except for units 5, 6 and 9, which ! are commonly reserved for console I/O). ! ! Otherwise, IUNIT is an integer between 1 and 99, representing a ! free FORTRAN unit. Note that GET_UNIT assumes that units 5 and 6 ! are special, and will never return those values. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 18 September 2005 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Output, integer IUNIT, the free unit number. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer i integer ios integer iunit logical lopen iunit = 0 do i = 1, 99 if ( i /= 5 .and. i /= 6 .and. i /= 9 ) then inquire ( unit = i, opened = lopen, iostat = ios ) if ( ios == 0 ) then if ( .not. lopen ) then iunit = i return end if end if end if end do return end subroutine i4mat_data_read ( input_filename, m, n, table ) !*****************************************************************************80 ! !! I4MAT_DATA_READ reads data from an I4MAT file. ! ! Discussion: ! ! An I4MAT is an array of I4's. ! ! The file may contain more than N points, but this routine ! will return after reading N points. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 27 January 2005 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) INPUT_FILENAME, the name of the input file. ! ! Input, integer M, the spatial dimension. ! ! Input, integer N, the number of points. ! ! Output, integer TABLE(M,N), the data. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer m integer n integer ierror character ( len = * ) input_filename integer input_status integer input_unit integer j character ( len = 255 ) line integer table(m,n) integer x(m) ierror = 0 call get_unit ( input_unit ) open ( unit = input_unit, file = input_filename, status = 'old', & iostat = input_status ) if ( input_status /= 0 ) then ierror = 1 write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'I4MAT_DATA_READ - Fatal error!' write ( *, '(a,i8)' ) ' Could not open the input file "' // & trim ( input_filename ) // '" on unit ', input_unit stop 1 end if j = 0 do while ( j < n ) read ( input_unit, '(a)', iostat = input_status ) line if ( input_status /= 0 ) then ierror = 2 write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'I4MAT_DATA_READ - Fatal error!' write ( *, '(a)' ) ' Error while reading lines of data.' write ( *, '(a,i8)' ) ' Number of values expected per line M = ', m write ( *, '(a,i8)' ) ' Number of data lines read, J = ', j write ( *, '(a,i8)' ) ' Number of data lines needed, N = ', n stop 1 end if if ( line(1:1) == '#' .or. len_trim ( line ) == 0 ) then cycle end if call s_to_i4vec ( line, m, x, ierror ) if ( ierror /= 0 ) then cycle end if j = j + 1 table(1:m,j) = x(1:m) end do close ( unit = input_unit ) return end subroutine i4mat_header_read ( input_filename, m, n ) !*****************************************************************************80 ! !! I4MAT_HEADER_READ reads the header from an I4MAT. ! ! Discussion: ! ! An I4MAT is an array of I4's. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 04 June 2004 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) INPUT_FILENAME, the name of the input file. ! ! Output, integer M, spatial dimension. ! ! Output, integer N, the number of points. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character ( len = * ) input_filename integer m integer n call file_column_count ( input_filename, m ) if ( m <= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'I4MAT_HEADER_READ - Fatal error!' write ( *, '(a)' ) ' There was some kind of I/O problem while trying' write ( *, '(a)' ) ' to count the number of data columns in' write ( *, '(a)' ) ' the file "' // trim ( input_filename ) // '".' stop 1 end if call file_row_count ( input_filename, n ) if ( n <= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'I4MAT_HEADER_READ - Fatal error!' write ( *, '(a)' ) ' There was some kind of I/O problem while trying' write ( *, '(a)' ) ' to count the number of data rows in' write ( *, '(a)' ) ' the file "' // trim ( input_filename ) // '".' stop 1 end if return end subroutine i4mat_transpose_print ( m, n, a, title ) !*****************************************************************************80 ! !! I4MAT_TRANSPOSE_PRINT prints an I4MAT, transposed. ! ! Discussion: ! ! An I4MAT is a rectangular array of integer values. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 28 December 2004 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, integer M, N, the number of rows and columns. ! ! Input, integer A(M,N), an M by N matrix to be printed. ! ! Input, character ( len = * ) TITLE, an optional title. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer m integer n integer a(m,n) character ( len = * ) title call i4mat_transpose_print_some ( m, n, a, 1, 1, m, n, title ) return end subroutine i4mat_transpose_print_some ( m, n, a, ilo, jlo, ihi, jhi, title ) !*****************************************************************************80 ! !! I4MAT_TRANSPOSE_PRINT_SOME prints some of the transpose of an I4MAT. ! ! Discussion: ! ! An I4MAT is a rectangular array of integer values. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 09 February 2005 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, integer M, N, the number of rows and columns. ! ! Input, integer A(M,N), an M by N matrix to be printed. ! ! Input, integer ILO, JLO, the first row and column to print. ! ! Input, integer IHI, JHI, the last row and column to print. ! ! Input, character ( len = * ) TITLE, an optional title. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer, parameter :: incx = 10 integer m integer n integer a(m,n) character ( len = 8 ) ctemp(incx) integer i integer i2 integer i2hi integer i2lo integer ihi integer ilo integer inc integer j integer j2hi integer j2lo integer jhi integer jlo character ( len = * ) title if ( 0 < len_trim ( title ) ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) trim ( title ) end if do i2lo = max ( ilo, 1 ), min ( ihi, m ), incx i2hi = i2lo + incx - 1 i2hi = min ( i2hi, m ) i2hi = min ( i2hi, ihi ) inc = i2hi + 1 - i2lo write ( *, '(a)' ) ' ' do i = i2lo, i2hi i2 = i + 1 - i2lo write ( ctemp(i2), '(i8)' ) i end do write ( *, '('' Row '',10a8)' ) ctemp(1:inc) write ( *, '(a)' ) ' Col' write ( *, '(a)' ) ' ' j2lo = max ( jlo, 1 ) j2hi = min ( jhi, n ) do j = j2lo, j2hi do i2 = 1, inc i = i2lo - 1 + i2 write ( ctemp(i2), '(i8)' ) a(i,j) end do write ( *, '(i5,1x,10a8)' ) j, ( ctemp(i), i = 1, inc ) end do end do return end subroutine i4mat_write ( output_filename, m, n, table ) !*****************************************************************************80 ! !! I4MAT_WRITE writes an I4MAT file. ! ! Discussion: ! ! An I4MAT is an array of I4's. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 31 August 2009 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) OUTPUT_FILENAME, the output file name. ! ! Input, integer M, the spatial dimension. ! ! Input, integer N, the number of points. ! ! Input, integer TABLE(M,N), the data. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer m integer n integer j character ( len = * ) output_filename integer output_status integer output_unit character ( len = 30 ) string integer table(m,n) ! ! Open the file. ! call get_unit ( output_unit ) open ( unit = output_unit, file = output_filename, & status = 'replace', iostat = output_status ) if ( output_status /= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'I4MAT_WRITE - Fatal error!' write ( *, '(a,i8)' ) ' Could not open the output file "' // & trim ( output_filename ) // '" on unit ', output_unit output_unit = -1 stop 1 end if ! ! Create a format string. ! if ( 0 < m .and. 0 < n ) then write ( string, '(a1,i8,a4)' ) '(', m, 'i10)' ! ! Write the data. ! do j = 1, n write ( output_unit, string ) table(1:m,j) end do end if ! ! Close the file. ! close ( unit = output_unit ) return end subroutine r8mat_data_read ( input_filename, m, n, table ) !*****************************************************************************80 ! !! R8MAT_DATA_READ reads data from an R8MAT file. ! ! Discussion: ! ! An R8MAT is an array of R8 values. ! ! Discussion: ! ! The file may contain more than N points, but this routine will ! return after reading N of them. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 18 October 2008 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) INPUT_FILENAME, the name of the input file. ! ! Input, integer M, the spatial dimension. ! ! Input, integer N, the number of points. ! ! Output, real ( kind = rk ) TABLE(M,N), the data. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer m integer n integer ierror character ( len = * ) input_filename integer input_status integer input_unit integer j character ( len = 255 ) line real ( kind = rk ) table(m,n) real ( kind = rk ) x(m) ierror = 0 call get_unit ( input_unit ) open ( unit = input_unit, file = input_filename, status = 'old', & iostat = input_status ) if ( input_status /= 0 ) then ierror = 1 write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'R8MAT_DATA_READ - Fatal error!' write ( *, '(a,i8)' ) ' Could not open the input file "' // & trim ( input_filename ) // '" on unit ', input_unit stop 1 end if j = 0 do while ( j < n ) read ( input_unit, '(a)', iostat = input_status ) line if ( input_status /= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'R8MAT_DATA_READ - Fatal error!' write ( *, '(a)' ) ' Error while reading lines of data.' write ( *, '(a,i8)' ) ' Number of values expected per line M = ', m write ( *, '(a,i8)' ) ' Number of data lines read, J = ', j write ( *, '(a,i8)' ) ' Number of data lines needed, N = ', n stop 1 end if if ( line(1:1) == '#' .or. len_trim ( line ) == 0 ) then cycle end if call s_to_r8vec ( line, m, x, ierror ) if ( ierror /= 0 ) then cycle end if j = j + 1 table(1:m,j) = x(1:m) end do close ( unit = input_unit ) return end subroutine r8mat_header_read ( input_filename, m, n ) !*****************************************************************************80 ! !! R8MAT_HEADER_READ reads the header from an R8MAT file. ! ! Discussion: ! ! An R8MAT is an array of R8 values. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 07 September 2004 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) INPUT_FILENAME, the name of the input file. ! ! Output, integer M, spatial dimension. ! ! Output, integer N, the number of points. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character ( len = * ) input_filename integer m integer n call file_column_count ( input_filename, m ) if ( m <= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'R8MAT_HEADER_READ - Fatal error!' write ( *, '(a)' ) ' There was some kind of I/O problem while trying' write ( *, '(a)' ) ' to count the number of data columns in' write ( *, '(a)' ) ' the file "' // trim ( input_filename ) // '".' stop 1 end if call file_row_count ( input_filename, n ) if ( n <= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'R8MAT_HEADER_READ - Fatal error!' write ( *, '(a)' ) ' There was some kind of I/O problem while trying' write ( *, '(a)' ) ' to count the number of data rows in' write ( *, '(a)' ) ' the file "' // trim ( input_filename ) // '".' stop 1 end if return end subroutine r8mat_transpose_print ( m, n, a, title ) !*****************************************************************************80 ! !! R8MAT_TRANSPOSE_PRINT prints an R8MAT, transposed. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 14 June 2004 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, integer M, N, the number of rows and columns. ! ! Input, real ( kind = rk ) A(M,N), an M by N matrix to be printed. ! ! Input, character ( len = * ) TITLE, an optional title. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer m integer n real ( kind = rk ) a(m,n) character ( len = * ) title call r8mat_transpose_print_some ( m, n, a, 1, 1, m, n, title ) return end subroutine r8mat_transpose_print_some ( m, n, a, ilo, jlo, ihi, jhi, title ) !*****************************************************************************80 ! !! R8MAT_TRANSPOSE_PRINT_SOME prints some of an R8MAT, transposed. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 14 June 2004 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, integer M, N, the number of rows and columns. ! ! Input, real ( kind = rk ) A(M,N), an M by N matrix to be printed. ! ! Input, integer ILO, JLO, the first row and column to print. ! ! Input, integer IHI, JHI, the last row and column to print. ! ! Input, character ( len = * ) TITLE, an optional title. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer, parameter :: incx = 5 integer m integer n real ( kind = rk ) a(m,n) character ( len = 14 ) ctemp(incx) integer i integer i2 integer i2hi integer i2lo integer ihi integer ilo integer inc integer j integer j2hi integer j2lo integer jhi integer jlo character ( len = * ) title if ( 0 < len_trim ( title ) ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) trim ( title ) end if do i2lo = max ( ilo, 1 ), min ( ihi, m ), incx i2hi = i2lo + incx - 1 i2hi = min ( i2hi, m ) i2hi = min ( i2hi, ihi ) inc = i2hi + 1 - i2lo write ( *, '(a)' ) ' ' do i = i2lo, i2hi i2 = i + 1 - i2lo write ( ctemp(i2), '(i8,6x)' ) i end do write ( *, '('' Row '',5a14)' ) ctemp(1:inc) write ( *, '(a)' ) ' Col' write ( *, '(a)' ) ' ' j2lo = max ( jlo, 1 ) j2hi = min ( jhi, n ) do j = j2lo, j2hi do i2 = 1, inc i = i2lo - 1 + i2 write ( ctemp(i2), '(g14.6)' ) a(i,j) end do write ( *, '(i5,1x,5a14)' ) j, ( ctemp(i), i = 1, inc ) end do end do write ( *, '(a)' ) ' ' return end subroutine r8mat_write ( output_filename, m, n, table ) !*****************************************************************************80 ! !! R8MAT_WRITE writes an R8MAT file. ! ! Discussion: ! ! An R8MAT is an array of R8 values. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 31 May 2009 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) OUTPUT_FILENAME, the output file name. ! ! Input, integer M, the spatial dimension. ! ! Input, integer N, the number of points. ! ! Input, real ( kind = rk ) TABLE(M,N), the data. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer m integer n integer j character ( len = * ) output_filename integer output_status integer output_unit character ( len = 30 ) string real ( kind = rk ) table(m,n) ! ! Open the file. ! call get_unit ( output_unit ) open ( unit = output_unit, file = output_filename, & status = 'replace', iostat = output_status ) if ( output_status /= 0 ) then write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'R8MAT_WRITE - Fatal error!' write ( *, '(a,i8)' ) ' Could not open the output file "' // & trim ( output_filename ) // '" on unit ', output_unit output_unit = -1 stop 1 end if ! ! Create a format string. ! ! For less precision in the output file, try: ! ! '(', m, 'g', 14, '.', 6, ')' ! if ( 0 < m .and. 0 < n ) then write ( string, '(a1,i8,a1,i8,a1,i8,a1)' ) '(', m, 'g', 24, '.', 16, ')' ! ! Write the data. ! do j = 1, n write ( output_unit, string ) table(1:m,j) end do end if ! ! Close the file. ! close ( unit = output_unit ) return end subroutine s_blank_delete ( s ) !*****************************************************************************80 ! !! S_BLANK_DELETE removes blanks from a string, left justifying the remainder. ! ! Discussion: ! ! All TAB characters are also removed. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 26 July 1998 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input/output, character ( len = * ) S, the string to be transformed. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character c integer get integer put integer nchar character ( len = * ) s character, parameter :: TAB = char ( 9 ) put = 0 nchar = len_trim ( s ) do get = 1, nchar c = s(get:get) if ( c /= ' ' .and. c /= TAB ) then put = put + 1 s(put:put) = c end if end do s(put+1:nchar) = ' ' return end subroutine s_to_i4 ( s, value, ierror, length ) !*****************************************************************************80 ! !! S_TO_I4 reads an I4 from a string. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 13 January 2006 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) S, a string to be examined. ! ! Output, integer VALUE, the integer value read from the string. ! If the string is blank, then VALUE will be returned 0. ! ! Output, integer IERROR, an error flag. ! 0, no error. ! 1, an error occurred. ! ! Output, integer LENGTH, the number of characters of S used ! to make the integer. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character c integer i integer ierror integer isgn integer length character ( len = * ) s integer state integer value value = 0 ierror = 0 length = 0 state = 0 isgn = 1 do i = 1, len_trim ( s ) c = s(i:i) ! ! STATE = 0, haven't read anything. ! if ( state == 0 ) then if ( c == ' ' ) then else if ( c == '-' ) then state = 1 isgn = -1 else if ( c == '+' ) then state = 1 isgn = +1 else if ( lle ( '0', c ) .and. lle ( c, '9' ) ) then state = 2 value = ichar ( c ) - ichar ( '0' ) else ierror = 1 return end if ! ! STATE = 1, have read the sign, expecting digits or spaces. ! else if ( state == 1 ) then if ( c == ' ' ) then else if ( lle ( '0', c ) .and. lle ( c, '9' ) ) then state = 2 value = ichar ( c ) - ichar ( '0' ) else ierror = 1 return end if ! ! STATE = 2, have read at least one digit, expecting more. ! else if ( state == 2 ) then if ( lle ( '0', c ) .and. lle ( c, '9' ) ) then value = 10 * value + ichar ( c ) - ichar ( '0' ) else value = isgn * value ierror = 0 length = i - 1 return end if end if end do ! ! If we read all the characters in the string, see if we're OK. ! if ( state == 2 ) then value = isgn * value ierror = 0 length = len_trim ( s ) else value = 0 ierror = 1 length = 0 end if return end subroutine s_to_i4vec ( s, n, ivec, ierror ) !*****************************************************************************80 ! !! S_TO_I4VEC reads an I4VEC from a string. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 08 October 2003 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) S, the string to be read. ! ! Input, integer N, the number of values expected. ! ! Output, integer IVEC(N), the values read from the string. ! ! Output, integer IERROR, error flag. ! 0, no errors occurred. ! -K, could not read data for entries -K through N. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer n integer i integer ierror integer ilo integer ivec(n) integer length character ( len = * ) s i = 0 ierror = 0 ilo = 1 do while ( i < n ) i = i + 1 call s_to_i4 ( s(ilo:), ivec(i), ierror, length ) if ( ierror /= 0 ) then ierror = -i exit end if ilo = ilo + length end do return end subroutine s_to_r8 ( s, dval, ierror, length ) !*****************************************************************************80 ! !! S_TO_R8 reads a R8 number from a string. ! ! Discussion: ! ! The routine will read as many characters as possible until it reaches ! the end of the string, or encounters a character which cannot be ! part of the number. ! ! Legal input is: ! ! 1 blanks, ! 2 '+' or '-' sign, ! 2.5 blanks ! 3 integer part, ! 4 decimal point, ! 5 fraction part, ! 6 'E' or 'e' or 'D' or 'd', exponent marker, ! 7 exponent sign, ! 8 exponent integer part, ! 9 exponent decimal point, ! 10 exponent fraction part, ! 11 blanks, ! 12 final comma or semicolon, ! ! with most quantities optional. ! ! Example: ! ! S DVAL ! ! '1' 1.0 ! ' 1 ' 1.0 ! '1A' 1.0 ! '12,34,56' 12.0 ! ' 34 7' 34.0 ! '-1E2ABCD' -100.0 ! '-1X2ABCD' -1.0 ! ' 2E-1' 0.2 ! '23.45' 23.45 ! '-4.2E+2' -420.0 ! '17d2' 1700.0 ! '-14e-2' -0.14 ! 'e2' 100.0 ! '-12.73e-9.23' -12.73 * 10.0^(-9.23) ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 07 September 2004 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) S, the string containing the ! data to be read. Reading will begin at position 1 and ! terminate at the end of the string, or when no more ! characters can be read to form a legal real. Blanks, ! commas, or other nonnumeric data will, in particular, ! cause the conversion to halt. ! ! Output, real ( kind = rk ) DVAL, the value read from the string. ! ! Output, integer IERROR, error flag. ! 0, no errors occurred. ! 1, 2, 6 or 7, the input number was garbled. The ! value of IERROR is the last type of input successfully ! read. For instance, 1 means initial blanks, 2 means ! a plus or minus sign, and so on. ! ! Output, integer LENGTH, the number of characters read ! to form the number, including any terminating ! characters such as a trailing comma or blanks. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) logical ch_eqi character c real ( kind = rk ) dval integer ierror integer ihave integer isgn integer iterm integer jbot integer jsgn integer jtop integer length integer nchar integer ndig real ( kind = rk ) rbot real ( kind = rk ) rexp real ( kind = rk ) rtop character ( len = * ) s nchar = len_trim ( s ) ierror = 0 dval = 0.0D+00 length = -1 isgn = 1 rtop = 0 rbot = 1 jsgn = 1 jtop = 0 jbot = 1 ihave = 1 iterm = 0 do length = length + 1 if ( nchar < length+1 ) then exit end if c = s(length+1:length+1) ! ! Blank character. ! if ( c == ' ' ) then if ( ihave == 2 ) then else if ( ihave == 6 .or. ihave == 7 ) then iterm = 1 else if ( 1 < ihave ) then ihave = 11 end if ! ! Comma. ! else if ( c == ',' .or. c == ';' ) then if ( ihave /= 1 ) then iterm = 1 ihave = 12 length = length + 1 end if ! ! Minus sign. ! else if ( c == '-' ) then if ( ihave == 1 ) then ihave = 2 isgn = -1 else if ( ihave == 6 ) then ihave = 7 jsgn = -1 else iterm = 1 end if ! ! Plus sign. ! else if ( c == '+' ) then if ( ihave == 1 ) then ihave = 2 else if ( ihave == 6 ) then ihave = 7 else iterm = 1 end if ! ! Decimal point. ! else if ( c == '.' ) then if ( ihave < 4 ) then ihave = 4 else if ( 6 <= ihave .and. ihave <= 8 ) then ihave = 9 else iterm = 1 end if ! ! Scientific notation exponent marker. ! else if ( ch_eqi ( c, 'E' ) .or. ch_eqi ( c, 'D' ) ) then if ( ihave < 6 ) then ihave = 6 else iterm = 1 end if ! ! Digit. ! else if ( ihave < 11 .and. lle ( '0', c ) .and. lle ( c, '9' ) ) then if ( ihave <= 2 ) then ihave = 3 else if ( ihave == 4 ) then ihave = 5 else if ( ihave == 6 .or. ihave == 7 ) then ihave = 8 else if ( ihave == 9 ) then ihave = 10 end if call ch_to_digit ( c, ndig ) if ( ihave == 3 ) then rtop = 10.0D+00 * rtop + real ( ndig, kind = rk ) else if ( ihave == 5 ) then rtop = 10.0D+00 * rtop + real ( ndig, kind = rk ) rbot = 10.0D+00 * rbot else if ( ihave == 8 ) then jtop = 10 * jtop + ndig else if ( ihave == 10 ) then jtop = 10 * jtop + ndig jbot = 10 * jbot end if ! ! Anything else is regarded as a terminator. ! else iterm = 1 end if ! ! If we haven't seen a terminator, and we haven't examined the ! entire string, go get the next character. ! if ( iterm == 1 ) then exit end if end do ! ! If we haven't seen a terminator, and we have examined the ! entire string, then we're done, and LENGTH is equal to NCHAR. ! if ( iterm /= 1 .and. length+1 == nchar ) then length = nchar end if ! ! Number seems to have terminated. Have we got a legal number? ! Not if we terminated in states 1, 2, 6 or 7! ! if ( ihave == 1 .or. ihave == 2 .or. ihave == 6 .or. ihave == 7 ) then ierror = ihave write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'S_TO_R8 - Serious error!' write ( *, '(a)' ) ' Illegal or nonnumeric input:' write ( *, '(a)' ) ' ' // trim ( s ) return end if ! ! Number seems OK. Form it. ! if ( jtop == 0 ) then rexp = 1.0D+00 else if ( jbot == 1 ) then rexp = 10.0D+00 ** ( jsgn * jtop ) else rexp = 10.0D+00 ** ( real ( jsgn * jtop, kind = rk ) & / real ( jbot, kind = rk ) ) end if end if dval = real ( isgn, kind = rk ) * rexp * rtop / rbot return end subroutine s_to_r8vec ( s, n, rvec, ierror ) !*****************************************************************************80 ! !! S_TO_R8VEC reads a R8VEC from a string. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 25 January 2005 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) S, the string to be read. ! ! Input, integer N, the number of values expected. ! ! Output, real ( kind = rk ) RVEC(N), the values read from the string. ! ! Output, integer IERROR, error flag. ! 0, no errors occurred. ! -K, could not read data for entries -K through N. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) integer n integer i integer ierror integer ilo integer lchar real ( kind = rk ) rvec(n) character ( len = * ) s i = 0 ierror = 0 ilo = 1 do while ( i < n ) i = i + 1 call s_to_r8 ( s(ilo:), rvec(i), ierror, lchar ) if ( ierror /= 0 ) then ierror = -i exit end if ilo = ilo + lchar end do return end subroutine s_word_count ( s, word_num ) !*****************************************************************************80 ! !! S_WORD_COUNT counts the number of "words" in a string. ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 05 October 2003 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! Input, character ( len = * ) S, the string to be examined. ! ! Output, integer WORD_NUM, the number of "words" in the string. ! Words are presumed to be separated by one or more blanks. ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) logical blank integer i character ( len = * ) s integer s_len integer word_num word_num = 0 s_len = len ( s ) if ( s_len <= 0 ) then return end if blank = .true. do i = 1, s_len if ( s(i:i) == ' ' ) then blank = .true. else if ( blank ) then word_num = word_num + 1 blank = .false. end if end do return end subroutine timestamp ( ) !*****************************************************************************80 ! !! TIMESTAMP prints the current YMDHMS date as a time stamp. ! ! Example: ! ! 31 May 2001 9:45:54.872 AM ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 18 May 2013 ! ! Author: ! ! John Burkardt ! ! Parameters: ! ! None ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) character ( len = 8 ) ampm integer d integer h integer m integer mm character ( len = 9 ), parameter, dimension(12) :: month = (/ & 'January ', 'February ', 'March ', 'April ', & 'May ', 'June ', 'July ', 'August ', & 'September', 'October ', 'November ', 'December ' /) integer n integer s integer values(8) integer y call date_and_time ( values = values ) y = values(1) m = values(2) d = values(3) h = values(5) n = values(6) s = values(7) mm = values(8) if ( h < 12 ) then ampm = 'AM' else if ( h == 12 ) then if ( n == 0 .and. s == 0 ) then ampm = 'Noon' else ampm = 'PM' end if else h = h - 12 if ( h < 12 ) then ampm = 'PM' else if ( h == 12 ) then if ( n == 0 .and. s == 0 ) then ampm = 'Midnight' else ampm = 'AM' end if end if end if write ( *, '(i2.2,1x,a,1x,i4,2x,i2,a1,i2.2,a1,i2.2,a1,i3.3,1x,a)' ) & d, trim ( month(m) ), y, h, ':', n, ':', s, '.', mm, trim ( ampm ) return end