16-bit signed binary integer

Sample Fortran usage C function (by Reference)
INTEGER*2 X
X = 5
CALL CENTRY(X)
PRINT *,
1  'UPDATED VALUE IN FORTRAN:', X
END
#pragma linkage (centry,FORTRAN)
#include <stdio.h>
void centry(short int *x)
{
  printf("C int arg value: %d\n",*x);
  *x += 1;
}