C++ OOP project [1] –

1.

#. 이론

1. call by reference

#include <iostream>

using std::cout;
using std::endl;

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

int main(void)
{
    int val1=10;
    int val2=20;

    cout << " val1: " << val1 << ' ';
    cout << " val2: " << val2 <<endl;

    swap(val1, val2);
    cout<<" val1: "<<val1<<' ';
    cout<<" val2: "<<val2<<endl;

    return 0;
}