c语言程序设计第清华大学教程.pptx

会计学;2;3;4;5;6;7;8;9;10;11;12;13;14;15;16;17;void Clock::SetTime(int NewH, int NewM, int NewS) { Hour=NewH; Minute=NewM; Second=NewS; } void Clock::ShowTime() { coutHour:Minute:Second; };19;20;21;22;23;inline void Point:: Init(int initX,int initY) { X=initX; Y=initY; } inline int Point::GetX() { return X; } inline int Point::GetY() { return Y; };25;26;27;28;29;构造函数的实现： Clock::Clock(int NewH, int NewM, int NewS) { Hour= NewH; Minute= NewM; Second= NewS; } 建立???象时构造函数的作用： int main() { Clock c(0,0,0); //隐含调用构造函数，将初始值作为实参。 c.ShowTime(); };31;32;Point::Point (Point p) { X=p.X; Y=p.Y; cout拷贝构造函数被调用endl; };34;35;36;37;38;39;Point::Point(int xx,int yy) { X=xx; Y=yy; } Point::~Point() { } //...其他函数的实现略;41;#include iostream using namespace std; const float PI = 3.14159; const float FencePrice = 35; const float ConcretePrice = 20; //声明类Circle 及其数据和方法 class Circle { private: float radius; public: Circle(float r); //构造函数 float Circumference() const; //圆周长 float Area() const; //圆面积 };;// 类的实现 // 构造函数初始化数据成员radius Circle::Circle(float r) {radius=r} // 计算圆的周长 float Circle::Circumference() const { return 2 * PI * radius; } // 计算圆的面积 float Circle::Area() const { return PI * radius * radius; };void main () { float radius; float FenceCost, ConcreteCost; // 提示用户输入半径 coutEnter the radius of the pool: ; cinradius; // 声明 Circle 对象 Circle Pool(radius); Circle PoolRim(radius + 3); ; //计算栅栏造价并输出 FenceCost=PoolRim.Circumference()*FencePrice; coutFencing Cost is ￥FenceCostendl; //计算过道造价并输出 ConcreteCost=(PoolRim.Area()- Pool.Area())*ConcretePrice; coutConcrete Cost is ￥ConcreteCostendl; } 运行结果 Enter the radius of the pool: 10 Fencing Cost is ￥2858.85 Concrete Cost is ￥4335.39;46;47;class Line { private: Point p1,p2; //线段的两个端点 public: Line(Point a,Point b); //构造函数 Void