#include<stdio.h>
void swapByValue(int, int); /* Prototype */
int main() /* Main function */
{
int n1 = 10, n2 = 20;
/* actual arguments will be as it is */
swapByValue(n1, n2);
printf("n1: %d, n2: %d\n", n1, n2);
}
void swapByValue(int a, int b)
{
int t;
t = a; a = b; b = t;
}