/* File: proto2.c
   Demonstrate the need for prototypes
   This is the corrected version.
*/
#include <stdio.h>
#include "genlib.h"
#include "simpio.h"

/* Include the prototype in this version */
double add3(double) ;

main() {
   double x ;
   int n, m ;

     x = add3(5.0) ;
     printf("x = %f\n", x) ;

     n = add3(10.0) ;
     printf("n = %d\n", n) ;

     m = (int) add3(17.0) ;
     printf("m = %d\n", m) ;
}

double add3(double y) {
   double z ;

   z = y + 3.0 ;
   return(z) ;
}