C++入门 类基础（1）如何写一个简单的类 并将其实例化

//A simple class that stored a data.

#include "stdafx.h"
#include<iostream>

using namespace std;

class Number
{
public:
    Number()
    {
        data = 0;
    }

    Number(int value)
    {
        data = value;
    }

    void rewrite(int value)
    {
        data = value;
    }

    int print()
    {
        return data;
    }
private:
    int data;
};

int main()
{
    cout << "Hello Haley Kong!" << endl;
    Number num1 = Number();
    cout << num1.print()  << endl;
    num1.rewrite(666);
    cout << num1.print() << endl;
    Number num2 = Number(128);
    cout << num2.print << endl;

    system("pause");
    return 0;
}