problem 55

#include <stdio.h>

void swap (int* x, int* y) {
    int temp = *x;
    *x = *y;
    *y = temp;
    return;
}

int main () {
    int a = 2;
    int b = 9;
    swap(&a, &b);
    printf("The value of a is: %d\n", a);
    printf("The value of b is: %d\n", b);
    return 0;
}

output : a=9
         b=2