c++ swap(값 교환)

#include <iostream>

using namespace std;

void swap(int &a, int &b){
	
	int temp;
	
	temp = a;
	a = b;
	b = temp;
	
}

int main(){
	
	int i = 10;
	int j = 20;
	
	cout << i << " " << j << endl;
	swap(i,j);
	cout << i << " " << j << endl;
	
}