#include <stdio.h>
#include <stdlib.h>

long plus(long x, long y) {
    return x + y;
}

void sumstore(long x, long y, long *dest)
{
    long t = plus(x, y);
    *dest = t;
}

int main(int argc, char *argv[]) {
  long x = atoi(argv[1]);
  long y = atoi(argv[2]);
  long z;
  sumstore(x, y, &z);
  printf("%ld + %ld --> %ld\n", x, y, z);
  return 0;
}