reZo

#include <stdio.h>#include <stdlib.h>void swap (int *a, int *b);int main (int argc, char *argv[]) {        if (argc != 3) {                printf("usage: %s (int x) (int y)\n", argv[0]);                return EXIT_FAILURE;        }        int x, y;        x = (int) argv[1];        y = (int) argv[2];        printf("(before) x %d y %d\n", x, y);        swap(&x, &y);        printf("(after) x %d y %d\n", x, y);}void swap (int *a, int *b) {        int temp;        temp = *a;        *a = *b;        *b = temp;}