CPP 함수 cvr, cba, cbv

#include <iostream>

using namespace std;

 

void cbr(int& a);

void cba(int* a);

void cbv(int a);

int main()

{

   int i = 3;

   cbr(i);      cout << i << endl;

   cba(&i);  cout << i << endl;

   cbv(i);      cout << i << endl;

}

void cbr(int& a) // call by refrence

{  a++; }

void cba(int* a) // call by address

{  (*a)++; }

void cbv(int a)     // call by value

{  a++; }