C + + toward Ocean--44 (Project One, point-circle-cylinder class family design, derived classes)

*/* Copyright ( c) 2016, School of Computer and Control engineering, Yantai University * All rights reserved. * File name: Text.cpp * Changxuan * Public Number: Worldhello * Completion Date: May 8, 2016 * version number: V1.0 * Problem Description: Derivation of Class * Program input: NO * program output: See operating results */#include <iostream                    Implementation of the >//Point class using Namespace Std;class point{public:point (double x=0,double y=0);                  constructor void SetPoint (double,double);              Sets the coordinate value double GetX () const {return x;}              Read x-coordinate double GetY () const {return y;} Read y-coordinate void show ();p rotected://protected Member double x,y;};/    The/point constructor point::P oint (double a,double b) {x=a; Y=b;}    Set x and Y coordinate values void Point::setpoint (double a,double b) {x=a; Y=b;} void Point::show () {cout<< "(" <<x<< "," <<y<< ")" <<ENDL;}    int main () {point P (2.4,5.1);    P.show ();    P.setpoint (1.8,3.2);    P.show (); return 0;} 

Operation Result:

#include <iostream>//The implementation of the circular class using namespace Std;class point{public:point (double x=0,double y                    =0);                  constructor void SetPoint (double,double);   Sets the coordinate value double GetX () const {return x;   Read x-coordinate} double GetY () const {return y; Read y-coordinate} void Show ();p rotected://protected Member double x,y;};/    The/point constructor point::P oint (double a,double b) {x=a; Y=b;}    Set x and Y coordinate values void Point::setpoint (double a,double b) {x=a; Y=b;} void Point::show () {cout<< "[" <<x<< "," <<y<< "]" &LT;&LT;ENDL;}  Class Circle:public Point//circle is the common derived class of the point class {public:circle (double x=0,double y=0,double r=0);                  constructor void Setradius (double);               Set the RADIUS value double Getradius () const;                   Read RADIUS value double area () const; Calculate Circle area Void Show ();p rotected:double radius;};/ /define constructors for center coordinates and RADIUS initialization circle::circle (double A,doubLe b,double R):P Oint (A, B), radius (r) {}//set radius value void Circle::setradius (double R) {radius=r;} Read RADIUS value double Circle::getradius () const{return radius; Calculate Circle Area Double Circle::area () const{return 3.14159*radius*radius;} Output Circle information void Circle::show () {cout<< "center= (" <<x<< "," <<y<< "), r=" <<radius< < ", area=" <<area () <<endl;}    int main () {Circle C (3.1,5,6.7);    cout<< "Original circle:\n";    C.show ();    C.setpoint (3,3);    cout<< "New circle:\n";    C.show (); return 0;}

Operation Result:

#include <iostream>//cylinder class implementation using namespace Std;class Point{public:point (double x=0,double y=0)                    ;                  constructor void SetPoint (double,double);   Sets the coordinate value double GetX () const {return x;   Read x-coordinate} double GetY () const {return y; Read y-coordinate} void Show ();p rotected://protected Member double x,y;};/    The/point constructor point::P oint (double a,double b) {x=a; Y=b;}    Set x and Y coordinate values void Point::setpoint (double a,double b) {x=a; Y=b;} void Point::show () {cout<< "[" <<x<< "," <<y<< "]" &LT;&LT;ENDL;}  Class Circle:public Point//circle is the common derived class of the point class {public:circle (double x=0,double y=0,double r=0);                  constructor void Setradius (double);               Set the RADIUS value double Getradius () const;                   Read RADIUS value double area () const; Calculate Circle area Void Show ();p rotected:double radius;};/ /define constructors for center coordinates and RADIUS initialization circle::circle (double a,doubleB,double r):P Oint (A, B), radius (r) {}//set radius value void Circle::setradius (double R) {radius=r;} Read RADIUS value double Circle::getradius () const{return radius; Calculate Circle Area Double Circle::area () const{return 3.14159*radius*radius;} Output Circle information void Circle::show () {cout<< "center=[" <<x<< "," <<y<< "], r=" <<radius< < ", area=" <<area () <<endl;} Class Cylinder:public Circle{public:cylinder (double x=0,double y=0,double r=0,double h=0);//constructor void SetHeight (Do                      uble);                    Set cylinder high double getheight () const;                         Read cylinder high double area () const;                       Calculates the cylindrical surface area double volume () const;                               Calculates the cylinder volume void show ();p rotected:double height; Cylindrical high};//definition constructor Cylinder::cylinder (double a,double b,double r,double h): Circle (a,b,r), height (h) {}//set cylinder high void Cylinder::setheight (Double h) {height=h;} Read cylinder high double cylinder::getheight () const{return height;Calculate cylindrical surface Area double Cylinder::area () const{return 2*circle::area () +2*3.14159*radius*height; Calculates the cylinder volume double cylinder::volume () const{return Circle::area () *height; void Cylinder::show () {cout<< "center=[" <<x<< "," <<y<< "], r=" <<radius<< ", H= "<
Operation Result:

C + + toward Ocean--44 (Project One, point-circle-cylinder class family design, derived classes)