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

void swapNumbers(int *a, int *b);

int main()
{
    int n;
    int m;

    printf("Enter n: ");
    scanf("%d", &n);

    printf("Enter m: ");
    scanf("%d", &m);

    swapNumbers(n, m);

    printf("n = %d\n", n);
    printf("m = %d", m);

    return 0;
}

void swapNumbers(int *a, int *b){
    int c = *a;
    *a = *b;
    *b = *c;
}