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

  void swap(int i, int j) {

      int temp;
      temp = i;
      i =j;
      j =temp;

  }

  int main(int argc, char *argv[]) {

      int a=3, b=5;
      printf("before a= %d, b= %d\n",a,b);
      swap(a,b);
      printf("after a= %d, b= %d\n",a,b);
      return EXIT_SUCCESS;

  }