Problem A: 你会定义类吗？

Problem A: 你会定义类吗？

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 1373  Solved: 1078
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Description

定义一个类Demo，有构造函数、析构函数和成员函数show()，其中show()根据样例的格式输出具体属性值。该类只有一个int类型的成员。

Input

输入只有一个整数，int类型范围内。

Output

见样例。

Sample Input

-100

Sample Output

A data 10 is created!A data 0 is created!A data -100 is created!This is data 10This is data 0This is data -100A data -100 is erased!A data 0 is erased!A data 10 is erased!

HINT

Append Code

append.cc,

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#include <iostream>using namespace std;class Demo{private :    int x;public:    Demo(int y = 0)    {        cout<<"A data "<<y<<" is created!"<<endl;        x = y;    }    void show()    {        cout<<"This is data "<<x<<endl;    }    ~Demo()    {        cout<<"A data "<<x<<" is erased!"<<endl;    }};int main(){    Demo tmp(10), tmp2;    int d;    cin>>d;    Demo tmp3(d);     tmp.show();    tmp2.show();    tmp3.show();    return 0;}