[C++] Reference(레퍼런스)

#include<iostream>
using namespace std;
 
void change(int &a, int &b);
 
void main() {
    int a = 10;
    int b = 20;
 
    int &c = a; //reference 변수 선언 : a를 c로도 부르겠다.
    
    /*change(a, b);
 
    cout << a << endl;
    cout << b << endl;*/
 
    /*cout << &a << endl;
    cout << &b << endl;
    cout << &c << endl;*/
 
    //cout << a << endl;
    //cout << b << endl;
    //cout << c << endl;
        
    c = b;    
    cout << a << endl; 
    cout << b << endl; 
    cout << c << endl;
 
}
void change(int &a, int &b) {
    int temp;
 
    temp = a;
    a = b;
    b = temp;
}