中間試験1

1349 ワード

/*    

*                      

* Copyright (c)2013,                    

* All rightsreserved.         

*     :Rectangle.cpp       

*       :            

*    :2013 5 29       

*    : v1.0                 

*     :      

*     :   

*   :      

*  :

#include<iostream>
using namespace std;
class Rectangle
{
public:
    Rectangle(){x1=0;y1=0;x2=0;y2=0;}//    
    Rectangle(double X1,double Y1,double X2,double Y2):x1(X1),y1(Y1),x2(X2),y2(Y2){}
    Rectangle(const Rectangle&p){x1=p.x1;y1=p.y1;x2=p.x2;y2=p.y2;}
    void input(); // x,y       
    void output();//         
private:
    double x1;
    double y1;
    double x2;
    double y2;
};
void Rectangle::input()
{
    cin>>x1>>y1>>x2>>y2;
}
void Rectangle::output()
{
    cout<<(x2-x1)*(y2-y1)<<endl;
}
int main()
{
    Rectangle p1;
    p1.input();
    p1.output();
    Rectangle p2(p1);
    p2.output();
    Rectangle p3(1,1,6,3);
    p3.output();
    return 0;

}



*心得:戻り値の有無に注意!