[C언어] swap 1 (포인터)

#include<stdio.h>

void swap(int *, int *);

int main(void){

   int a = 100, b = 200;

   printf("a : %d, b : %d\n", a, b);

   swap(&a, &b);
   printf("a : %d, b : %d\n", a, b);

   return 0;
}

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