1 .設計立方體類

設計立方體類(Cube)，求出立方體的面積( 2*a*b + 2*a*c + 2*b*c )和體積( a * b * c)，分別用全局函數和成員函數判斷兩個立方體是否相等。

//立方體類 class Cub{ public:void setL(int l){ mL = l; }void setW(int w){ mW = w; }void setH(int h){ mH = h; }int getL(){ return mL; }int getW(){ return mW; }int getH(){ return mH; }//立方體面積int caculateS(){ return (mL*mW + mL*mH + mW*mH) * 2; }//立方體體積int caculateV(){ return mL * mW * mH; }//成員方法bool CubCompare(Cub& c){if (getL() == c.getL() && getW() == c.getW() && getH() == c.getH()){return true;}return false;} private:int mL; //長int mW; //寬int mH; //高 };//比較兩個立方體是否相等 bool CubCompare(Cub& c1, Cub& c2){if (c1.getL() == c2.getL() && c1.getW() == c2.getW() && c1.getH() == c2.getH()){return true;}return false; }void test(){Cub c1, c2;c1.setL(10);c1.setW(20);c1.setH(30);c2.setL(20);c2.setW(20);c2.setH(30);cout << "c1面積:" << c1.caculateS() << " 體積:" << c1.caculateV() << endl;cout << "c2面積:" << c2.caculateS() << " 體積:" << c2.caculateV() << endl;//比較兩個立方體是否相等if (CubCompare(c1, c2)){cout << "c1和c2相等!" << endl;}else{cout << "c1和c2不相等!" << endl;}if (c1.CubCompare(c2)){cout << "c1和c2相等!" << endl;}else{cout << "c1和c2不相等!" << endl;} }

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2.?點和圓的關系

設計一個圓形類（AdvCircle），和一個點類（Point），計算點和圓的關系。

假如圓心坐標為x0, y0, 半徑為r，點的坐標為x1, y1：

1）點在圓上：(x1-x0)*(x1-x0) + (y1-y0)*(y1-y0) == r*r

2）點在圓內：(x1-x0)*(x1-x0) + (y1-y0)*(y1-y0) < r*r

3）點在圓外：(x1-x0)*(x1-x0) + (y1-y0)*(y1-y0) > r*r

//點類 class Point{ public:void setX(int x){ mX = x; }void setY(int y){ mY = y; }int getX(){ return mX; }int getY(){ return mY; } private:int mX;int mY; };//圓類 class Circle{ public:void setP(int x,int y){mP.setX(x);mP.setY(y);}void setR(int r){ mR = r; }Point& getP(){ return mP; }int getR(){ return mR; }//判斷點和圓的關系void IsPointInCircle(Point& point){int distance = (point.getX() - mP.getX()) * (point.getX() - mP.getX()) + (point.getY() - mP.getY()) * (point.getY() - mP.getY());int radius = mR * mR;if (distance < radius){cout << "Point(" << point.getX() << "," << point.getY() << ")在圓內!" << endl;}else if (distance > radius){cout << "Point(" << point.getX() << "," << point.getY() << ")在圓外!" << endl;}else{cout << "Point(" << point.getX() << "," << point.getY() << ")在圓上!" << endl;}} private:Point mP; //圓心int mR; //半徑 };void test(){//實例化圓對象 Circle circle;circle.setP(20, 20);circle.setR(5);//實例化點對象 Point point;point.setX(25);point.setY(20);circle.IsPointInCircle(point); }

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轉載于:https://www.cnblogs.com/mmc9527/p/10429813.html

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