int i4_max ( int i1, int i2 );
int i4_min ( int i1, int i2 );
void i4vec_dec ( int n, int a[] );
void i4vec_inc ( int n, int a[] );
int i4vec_max ( int n, int a[] );
int i4vec_min ( int n, int a[] );
void sort_heap_external ( int n, int *indx, int *i, int *j, int isgn );
void r8st_data_read ( char *input_filename, int m, int n, int nst, 
  int ist[], int jst[], double a[] );
void r8st_header_print ( int i_min, int i_max, int j_min, int j_max, int m, 
  int n, int nst );
void r8st_header_read ( char *input_filename, int *i_min, int *i_max, int *j_min, 
  int *j_max, int *m, int *n, int *nst );
void r8st_print ( int m, int n, int nst, int ist[], int jst[], 
  double ast[], char *title );
void r8st_print_some ( int row1, int row2, int col1, int col2, int nst,
  int ist[], int jst[], double ast[], char *title );
void r8st_sort_a ( int m, int n, int nst, int ist[], int jst[], 
  double ast[] );
void r8st_transpose ( int *m, int *n, int nst, int ist[], int jst[], 
  double ast[] );
void r8st_write ( char *output_filename, int m, int n, int nst, 
  int ist[], int jst[], double ast[] );
void timestamp ( );