program main c*********************************************************************72 c cc MAIN is the main program for F77_MISTAKE. c c Licensing: c c This code is distributed under the MIT license. c c Modified: c c 31 July 2016 c c Author: c c John Burkardt c c Parameters: c c None c implicit none write ( *, '(a)' ) '' write ( *, '(a)' ) 'F77_MISTAKE' write ( *, '(a)' ) ' FORTRAN77 version.' call f77_mistake1 ( ) c c Terminate. c write ( *, '(a)' ) '' write ( *, '(a)' ) 'F77_MISTAKE' write ( *, '(a)' ) ' Normal end of execution.' write ( *, '(a)' ) '' call timestamp ( ) stop end subroutine f77_mistake1 ( ) c*********************************************************************72 c cc F77_MISTAKE1 tries to sum some integers but doesn't get the expected result. c c Licensing: c c This code is distributed under the MIT license. c c Modified: c c 31 July 2016 c c Author: c c John Burkardt c c Parameters: c c None c write ( *, '(a)' ) '' write ( *, '(a)' ) 'F77_MISTAKE1' write ( *, '(a)' ) ' Compute and print the sum of the integers' write ( *, '(a)' ) ' from 1 to 100.' isum = 0 do 10 i = 1. 100 isum = isum + i 10 continue write ( *, '(a)' ) '' write ( *, '(a,i10)' ) ' 1+2+3+...+100 = ', isum return end subroutine timestamp ( ) c*********************************************************************72 c cc TIMESTAMP prints out the current YMDHMS date as a timestamp. c c Licensing: c c This code is distributed under the MIT license. c c Modified: c c 12 June 2014 c c Author: c c John Burkardt c c Parameters: c c None c implicit none character * ( 8 ) ampm integer d character * ( 8 ) date integer h integer m integer mm character * ( 9 ) month(12) integer n integer s character * ( 10 ) time integer y save month data month / & 'January ', 'February ', 'March ', 'April ', & 'May ', 'June ', 'July ', 'August ', & 'September', 'October ', 'November ', 'December ' / call date_and_time ( date, time ) read ( date, '(i4,i2,i2)' ) y, m, d read ( time, '(i2,i2,i2,1x,i3)' ) h, n, s, mm if ( h .lt. 12 ) then ampm = 'AM' else if ( h .eq. 12 ) then if ( n .eq. 0 .and. s .eq. 0 ) then ampm = 'Noon' else ampm = 'PM' end if else h = h - 12 if ( h .lt. 12 ) then ampm = 'PM' else if ( h .eq. 12 ) then if ( n .eq. 0 .and. s .eq. 0 ) then ampm = 'Midnight' else ampm = 'AM' end if end if end if write ( *, & '(i2,1x,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