swap 함수 구현

#include <stdio.h>

void swap(int *a, int *b) {
    int temp = *a;
    *a = *b;
    *b = temp;
}
 
int main() {
    int a, b;
 
    printf("a : ");
    scanf("%d", &a);
 
    printf("b : ");
    scanf("%d", &b);
 
    printf("\n\n(before) a = %d\n(before) b = %d\n\n", a, b);
 
    swap(&a, &b);
    printf("swapped!\n\n");
 
    printf("(after) a = %d\n(after) b = %d\n", a, b);
 
    return 0;
}