32-bit signed binary integer

Sample C usage (by Value) Fortran function

#pragma linkage (cfort,FORTRAN)
#include <stdio.h>
int cfort( int );
main()
{
  int x, y;
  x=5;
  y = cfort(x);
  printf
    ("Value returned to C: %d\n", y);
}

FUNCTION CFORT ( ARG )
INTEGER*4 CFORT
INTEGER*4 ARG
PRINT *, 'FORTRAN ARG VALUE:', ARG
CFORT = ARG
END

Sample C usage (by Reference) Fortran function

#pragma linkage (cfort,FORTRAN)
#include <stdio.h>
int cfort( int * );
main()
{
  int x, y;
  x=5;
  y = cfort(&x);
  printf
    ("Value returned to C: %d\n", y);
}

FUNCTION CFORT ( ARG )
INTEGER*4 CFORT
INTEGER*4 ARG
PRINT *, 'FORTRAN ARG VALUE:', ARG
CFORT = ARG
END