C + + Class and Object Experiment (VI)

Problem:

1. Design describes the point CPoint class on the plane coordinates, which satisfies the following requirements:

• has x, y coordinate information;

• A constructor with default parameter values for initializing x and y coordinate information, respectively;

• Getx and Gety functions for obtaining x and y information, setx and sety functions for setting x and y information;

2, the design of a rectangular class Crectangle, the class meets the following requirements:

• Coordinate information with two points in the lower left and upper right corner of the rectangle, the data type of the two points is cpoint;

• With parametric constructor crectangle (const CPoint &, const CPoint &), the parameters are used to set the coordinate information of the lower left and upper right corner two points respectively;

• Features Setlpoint (const CPoint &) and Setrpoint (const CPoint &) with two point coordinates set in the lower-left corner and the upper-right corner

• Has the ability to obtain perimeter (getperimeter) and gain area (Getarea).

3. In the main function, complete the following tasks:

• Dynamically create an object A_rectagnle of the Crectangle class whose initial lower-left and upper-right coordinates are (2,5), (6,8), call Getperimeter and Getarea to get the perimeter and area of the rectangle, and display the perimeter and area on the screen;

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Next, I gross position the code to send out:

I used the. h and. cpp files, which are declared in the. h file and defined in the. cpp file.

The total works include: Cpoint.h cpoint.cpp rectangle.h rectangle.cpp main.cpp

Cpoint.h

#ifndef _cpoint_h#define_cpoint_h#include<iostream>using namespacestd;classcpoint{ Public: CPoint (intXinty): x (x), Y (y) {}intGetX (); intGetY (); voidSetX (int); voidSety (int); Private:    intx, y;};#endif

Cpoint.cpp

" cpoint.h " int Cpoint::getx () {    return  x;} int cpoint::gety () {    return  y;} void CPOINT::SETX (int  x) {    x=x;} void Cpoint::sety (int  y) {    y=y;}

Rectangle.h

#ifndef _rectangle_h#define_rectangle_h#include"cpoint.h"classcrectangle{ Public: Crectangle (ConstCPoint &a,ConstCPoint &b): C1 (a), C2 (b) {}voidSetlpoint (ConstCPoint &); voidSetrpoint (ConstCPoint &); voidGetperimeter (); voidGetarea ();Private: CPoint c1,c2;};#endif

Rectangle.cpp

#include"rectangle.h"#include"cpoint.h"voidCrectangle::setlpoint (ConstCPoint &a) {C1=A;}voidCrectangle::setrpoint (ConstCPoint &b) {C2=b;}voidCrectangle::getperimeter () {intPerimeter=0; Perimeter= (C2. GetX ()-c1. GetX ()) *2+ (C2. GetY ()-c1. GetY ()) *2; cout<<"Perimeter is:"<< Perimeter <<Endl;}voidCrectangle::getarea () {intArea=0; Area= (C2. GetX ()-c1. GetX ()) * (C2. GetY ()-C1.    GetY ()); cout<<"Area is :"<<Area<<Endl;}

Main.cpp

 #include  rectangle.h   " int   main () { const  CPoint A (2 , 5 ), B (6 , 8  );    Crectangle  *p=new   Crectangle (A, b);    P ->setlpoint (a);    P ->setrpoint (b);    P ->getperimeter ();    P ->getarea ();    Delete p;  return  0  ;}  

OK, that's it!

C + + Class and Object Experiment (VI)