#include <stdio.h>

int Simple(int, int);

int main(int argv, char*args[]){
int val_1 =0, val_2 =0;

scanf("%d %d", &val_1, &val_2);

printf("val_1: %d, val_2: %d\n", val_1, val_2);
Simple(val_1, val_2);
val_1 =0, val_2 =0;
}

int Simple(int num1, int num2){
int temp =0;

temp = num1;
num1 = num2;
num2 = temp;
temp =0;

printf("--->> val_1: %d, val_2: %d\n", num1, num2);
num1 =0, num2 =0;

return 0;
}

힌트: 컴공 1,2학년때 대부분 배우는 것임ㅇㅇ