實驗12：Problem A: 你會定義類嗎？，problem定義

實驗12：Problem A: 你會定義類嗎？，problem定義

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Problem A: 你會定義類嗎？

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 556  Solved: 464
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Description

定義一個類Demo，有構造函數、析構函數和成員函數show()，其中show()根據樣例的格式輸出具體屬性值。該類只有一個int類型的成員。

 

Input

輸入只有一個整數，int類型范圍內。

 

Output

見樣例。

 

Sample Input

-100

Sample Output

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

HINT

 

Append Code

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

    tmp.show();
    tmp2.show();
    tmp3.show();
    return 0;
}