#include <iostream>
using namespace std;
 
int Add(int a, int b){
	return a+b;
}
 
void swap(int *a, int *b){ //a와 b의 값을 자리바꿈
	int tmp = *a; //임시로 담아둘 공간 필요함
	*a = *b; //a가 가리키고 있는 곳에 b가 가리키는 값을 넣어라 > *포인터변수
	*b = tmp;
 
}
 
void swap2(int &a, int &b){ // & 참조자, 선언만 하면 안되고 연결 시켜야 하지만 함수의 파라미터로 사용할 때는 안해줘도 됨 자동연결
	int tmp = a; 
	a = b;
	b = tmp;
 
}
 
int X(int a){
	a = 7;
	return a;
}
 
 
int main() {
	int x, y, z;
	x = 1;
	y = 7;
 
	z = Add(x);
 
	cout << x << "," << y << endl;
	//swap(&x,&y); //& -> 주소 알려줌(포인터변수),  
	//swap2(x,y); 
	x = X(x);
	cout << x << "," << y << endl;
 
	return 0;
}

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