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

int sum(int x, int y)
{
    int t = x + y;
    return t;
}

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