32-bit signed binary integer

Sample PL/I usage C function

MY_PROG: PROC OPTIONS(MAIN);
    DCL CENTRY EXTERNAL ENTRY
      RETURNS (FIXED BIN(31));
    DCL X FIXED BIN(31);
    DCL Y FIXED BIN(31);
    X = 5;
    /* BY VALUE */
    Y=CENTRY((X));
END MY_PROG;

#pragma linkage (centry,PLI)
#include <stdio.h>
int centry(int x)
{
  printf("x is %d\n",x);
  return(x);
}

Sample PL/I usage C function

MY_PROG: PROC OPTIONS(MAIN);
    DCL CENTRY EXTERNAL ENTRY
      RETURNS (FIXED BIN(31));
    DCL X FIXED BIN(31);
    DCL Y FIXED BIN(31);
    X = 5;
    /* BY REFERENCE */
    Y=CENTRY(X);
END MY_PROG;

#pragma linkage (centry,PLI)
#include <stdio.h>
int centry(int *x)
{
  printf("*x is %d\n",x);
  return(*x);
}