Rectangle 矩形求面积 c++

#include <iostream.h> class Point { private: int itsX; int itsY; public: void SetX(int x) {itsX=x;} void SetY(int y) {itsY=y;} int GetX()const {return itsX;} int GetY()const {return itsY;} }; class Rectangle { private: Point itsUpperLeft; Point itsUpperRight; Point itsLowerLeft; Point itsLowerRight; int itsTop; int itsBottom; int itsLeft; int itsRight; public: Rectangle(int top,int left,int bottom,int right); ~Rectangle(){} int GetTop() const {return itsTop;} int GetBottom() const {return itsBottom;} int GetLeft() const {return itsLeft;} int GetRight() const {return itsRight;} void SetTop(int top) {itsTop=top;} void SetBottom(int bottom) {itsBottom=bottom;} void SetLeft(int left) {itsLeft=left;} void SetRight(int right) {itsRight=right;} Point GetUpperLeft() const {return itsUpperLeft;} Point GetLowerLeft() const {return itsLowerLeft;} Point GetUpperRight() const {return itsUpperRight;} Point GetLowerRight() const {return itsLowerRight;} void SetUpperLeft(Point Location) {itsUpperLeft=Location;} void SetLowerLeft(Point Location) {itsLowerLeft=Location;} void SetUpperRight(Point Location) {itsUpperRight=Location;} void SetLowerRight(Point Location) {itsLowerRight=Location;} int GetArea() const; }; Rectangle::Rectangle(int top,int left,int bottom,int right) { itsTop=top; itsBottom=bottom; itsLeft=left; itsRight=right; itsUpperLeft.SetX(left); itsUpperLeft.SetY(top); itsUpperRight.SetX(right); itsUpperRight.SetY(top); itsLowerLeft.SetX(left); itsLowerLeft.SetY(bottom); itsLowerRight.SetX(right); itsLowerRight.SetY(bottom); } int Rectangle::GetArea() const { int Width=itsRight-itsLeft; int Height=itsTop-itsBottom; return (Width*Height); } int main() { int a,b,c,d; cout<<"Please inpute the UpperRightX UpperRighty LowerLeftX LowerLeftY "<<endl; cin>>d>>a>>b>>c; Rectangle MyRectangle(a,b,c,d); int Area=MyRectangle.GetArea(); cout<<"The Area of the Rectangle is:"<<Area<<"\n"; cout<<"UpperLeft"<<"("<<MyRectangle.GetUpperLeft().GetX()<<","<<MyRectangle.GetUpperLeft().GetY()<<")"<<endl; cout<<"UpperRight"<<"("<<MyRectangle.GetUpperRight().GetX()<<","<<MyRectangle.GetUpperRight().GetY()<<")"<<endl; cout<<"UpperLeft"<<"("<<MyRectangle.GetLowerLeft().GetX()<<","<<MyRectangle.GetLowerLeft().GetY()<<")"<<endl; cout<<"UpperRight"<<"("<<MyRectangle.GetLowerRight().GetX()<<","<<MyRectangle.GetLowerRight().GetY()<<")"<<endl; return 0; }