[C++] 기초

#include<iostream>
using namespace std;
//1. 사용자 정의 함수 선언
void disp(int a);
void input_ref(int &a);
void input_add(int *p);
 
void main() {
    int a = 10;
 
    disp(a); //call by value
 
             //a = input(a);
             //input_add(&a);
    input_ref(a);
    disp(a);
}
void input_ref(int &a) {
    cout << "input :";
    cin >> a;
}
void input_add(int *p) { //call by address
    cout << "input :";
    cin >> *p;
}
void disp(int a) {
    cout << a << endl;
}
 
 
 
 
//int a = 10;
//char b = 'a';
//float c = 2.4f;
 
//cout << a << "\t " << b << "\t" << c << std :: endl;
 
//std::cin >> a;
////cin >> b;
////cin >> c;
 
//std::cout << a << "\t " << b << "\t" << c << std::endl;