#include <stdio.h>
#include <iostream>

void swap(int *p, int *q)
{
    int storage;
    storage = *p;
    *p = *q;
    *q = storage;
    printf("%d , %d", p,q);
}
int main(void)
{
    int a;
    int b;
    printf("Please input a number: ");
    scanf("%d", &a);
    printf("\nEnter another number: ");
    scanf("%d", &b);
    printf("The first variable 'a' will always be shown first. Variable 'b' will follow.\n");
    printf("%d ,", a);
    printf(" %d", b);
    printf("\nNow the two variables' values will be swapped.\n");
    swap(&a,&b);
    printf("\n");
    system("pause");
}