小菜练手~~~~一道公司笔试题

一个Point类，然后一个Circle类,继承Point类。circle类能够实现求圆的面积，移动圆的位置，改变圆的大小，这几个函数。

我的程序：13:10 2010-10-5
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#include "stdafx.h"
#include <iostream>
#include <stdio.h>
#define PI 3.14159
using std::cin;
using std::cout;
using namespace std;

class Point
{
public:
    Point(){x=0,y=0;}
 ~Point(){cout<<"destory Point"<<endl;}
 void SetPoint(float a,float b){x=a,y=b;}
 void const Print(){cout<<"x="<<x<<","<<"y="<<y<<endl;}
private:
 float x;
 float y;
};

class Cricle:public Point
{
public:
 Cricle(){Point(),radius=0;}
 ~Cricle(){cout<<"destory Cricle"<<endl;}
 void SetCricle(float a,float b,float c){SetPoint(a,b),radius=c;}
 void const Area(){cout<<"Area="<<PI*radius*radius<<endl;}
 void const Print(){
                 Point::Print();
                 cout<<"radius="<<radius<<endl;
                   }
private:
 float radius;
};

int main()
{
 Cricle A;
 A.SetCricle(2,2,2);
 A.Area();
 A.Print();
    A.SetPoint(3,3);
 A.Print();
 system("Pause");
}