0 like 0 dislike
3.8k views

Please remember our 05-04 Lab Exercise 3: Write class shape with width and height

How to use Abstract class to solve the problem?

Write class shape with width and height following a constructor that gives value to them.

Then define two sub-classes triangle and rectangle.

Those sub-classes can calculate the area of the shape area().

Remember, Rectangle area = (width * height)

Triangle area = (width * height)/2

#include <iostream>
using namespace std;
// Base class
class Shape 
{
public:
   // Your code: pure virtual function providing interface framework.
   // constructor and setWidth(int w) and setHeight(int h) functions here
protected:
   int width;
   int height;
};
// Derived classes
class Rectangle: public Shape
{
public:
   // Your code:    int getArea()
};
class Triangle: public Shape
{
public:
   // Your code:    int getArea()
};
int main(void)
{
   Rectangle Rect;
   Triangle  Tri;
   int w,h;
   cin >>w>>h;
   Rect.setWidth(w);
   Rect.setHeight(h);
   cin >>w>>h;
   Tri.setWidth(w);
   Tri.setHeight(h);
   cout << Rect.getArea() << ";" << Tri.getArea() << endl; 
   return 0;
}

 

[Exercise] Coding (C) - asked in C++
ID: 24855 - Available when: Unlimited - Due to: Unlimited
| 3.8k views

17 Answers

0 like 0 dislike
Hidden content!
#include * * ** ***



using ** * std;



// Base class

class Shape ** ***



public:
* * *** * * ** ** ** pure virtual function * *** * *
* ** * ******* * int ** = 0;


* *** * * *** *** * * **** w) {
** * *** *** * * ** **** * ** * = w;
* * * ** *


* ** *** * * **** **** * ****** h) {
* * * * * ** ***** * ** ***** ** = h;
* * ** * * *


**
* * **** * * ** * * * width;
** **** *** * height;

};



// Derived classes

class ** * public Shape {



public:
*** * * * * ** {
* * *** * * **** * **** (width * height);
* * * ** ***** **

};



class ** ** public Shape {


*
* * ** * * * **** *** {
*** * ** *** ** * ****** ** ** *** (width * ** ***
* ** ** ** **

};



int * * * {
**** ** ** ** ** ***** ** Rect;
*** **** * * * * * * ** **
* * *** *** *** * ** **** * w,h;
* * ** ** ** * *** *** * * * ** * * *
** ** * * ** * * **
* * ** ** ******** **** *
* ** * ** * **** * ** * **** * * ***
* ** *** **** *** **** *
** *** * *** * * **** * ** *
* ** * **** ** ** Print the area of the object.
** ** *** * ** * * *** ** * ** * * ** * ** ** ** ** * * **** * * * ** ** endl;
** ****** ** * * 0;

}
answered by (-48 points)
0 like 0 dislike
Hidden content!
* * * * *** ** *

using * * * std;

// Base class

class Shape

{

public:
** **** ********** Your code: pure virtual * * *** * * ****
* * * ** * * * * * * and * * * w) and * ** * h) * ** here
* ******* * * ** x);
** ** ** ** *** *** ** * ** * **** y);
* **** *
** ***** * ** ** width;
******* * * * ** ** * height;

};

// Derived classes

class *** ** public Shape

{
**
***** ** * *** Your code: * * * * * * * * * *
** ** ** * * ** * ** *
** * ** * ** ** ** ** ** ** return ** ** ** *
* * * ** **** *

};

class * public Shape

{
*
*** * * * ** * Your code: ******* *** ** * ** ** ****
* * ** * ****
****** * * ** * * * * return * * *** ***
* * ** **** **

};
**** **

int * **** x){
** * * * ** * width = x;

}

int *** * ** y){
*** * ** height = y;

}



int * ** *

{
** * * *** *** * * Rect;
**** **** *** * **** * * * * *
* * ** ** *** * *** w,h;
* ** * * ** *** * *** ** *** ** ** *
* * * * * * ** * ****** **
** ******** ** *** ** * ** ** *
** * **** * * * * ** **
* * * *** ** * * * *
* ** ** *** * * * *** *
* ** ** *** ** ***** * * * ** * ** * *** * * * * ** * ** * **** ** * *** * * ** * * endl;

* ** * * **** ** 0;

}
answered by (-134 points)
0 like 0 dislike
Hidden content!
#include * ** ** **

using namespace std;

// Base class

class Shape

{

public:
* ** *** * * * * * Your code: pure virtual function providing interface framework.




* * ** * * ** *
***** * ** * **** * ** ***
*** * ** * *** * * ** * * ** ** ** *** * * *** * *
***** * *** ** *
***** * *** * ** *** * * * in){
** * ** ** * * * *** ** * * *
*** ***** *
* ********* ** * ** * ****** in){
* ******** * * *** * * ******* ** ***** * *
* ** * * * *
* ** * *** ** * *** constructor and ** * w) and ** *** h) functions here
* ** **
*** * **** * ** * ** * width;
* ** ** *** *** * * height;

};

// Derived classes

class Rectangle: public Shape

{

public:
**** * ** * ** Your code: ** **** * ** * getArea()
* * ** * * * *******
* ** **** * *** * * * ** *** * ** * * *** **
* *** * * *** *



};

class Triangle: public Shape

{

public:
** ** * **** * * Your code: **** * * * * getArea()
** ** *** ** ***** *** *
* * ** **** * *** ** * * * * ** **** ** ** * *
*** **** * ***



};

int main(void)

{
* * ** * * * ** ** * Rect;
***** * * * ** *** * ** ** * *
* * ** * ** w,h;
* **** * * *** * * * * ** **** * ** **
*** **** *** *** ** ***** **
*** *** * ***** * ** ** ***
** *** ** *** ** ** * * * *** *** * * * *
* *** ******* * **
***** ** ******* * * * ***
**** **** * * * *** * * * ** ** *** * * * * ** *** * ** ** ** * * * * ** **** * ** ** * * endl;
* **** * ** *** 0;

}
answered by (-581 points)
0 like 0 dislike
Hidden content!
#include * * *** * ***

using namespace std;

// Base class

class Shape

{

public:
********* * * * *** setWidth(int W)
* *** ** * * ** *
* * * ** * *** *** * *** * ** ** *
* ** * ********
*** ** * * * * setHeight(int H)
* * * * ***** * *
* *** *** ** ** * *** * * ** * ** *** **** **
*** ** * **** **


* * *** **** *** getH(void)
* * * ***** * * *
* * *** ***** ** * * *** * ** * *** ** * height;
* * * ** ***
* ***** * * getW(void)
* ** * ***
* ****** ** * *** * * ******** **** width;
* * * **** ** * ***



private:
** * * **** * * width;
**** * ** *** * height;

};

// Derived classes

class Rectangle: public Shape

{

public:
*** ** * * Your code: ** ** * * **** getArea()
* * * *** * * ** getArea()
** ** * * ***
* * ** * * ****** * ** * ** * * *** ** **** *
* * ** ** **

};

class Triangle: public Shape

{

public:
* * * ** ***** * Your code: * ** ** ** ** * * getArea()
***** * * ** ** *** * getArea()
** * ** ** ***
* * ** * ** **** ** ** **** ****** * *** *** **
** * ** * ****** * **

};

int main(void)

{
* **** * * ******* ** Rect;
* ** ** * * **  Tri;
* * ** * * ** *** w,h;
** ***** * * * * ** ** * ** * * * * *
*** * *** * *** ** *** *
* * * * ** * ***
**** ** * ** ****** * *** *** **
* *** * * ** *****
** ** *** * *** * *
*** * * * * * * ** * Rect.getArea() ** ** *** * ** * ** ***** * Tri.getArea() * * ** endl;
** ** ** ** ** ** 0;

}
answered by (-324 points)
0 like 0 dislike
Hidden content!
#include ** * ***** *

using namespace std;

class Shape

{

public:
* * ** ** * ** ** *** *** int setWidth(int n1){
***** *** **** * * * * * * ** *
* * **** ** *** ** *
** **** * *** ** * * int setHeight(int n2){
** * *** **** * ** *
*** * *** ****** * *
*** * * * ** ** * * getWidth(){
** *** * * * ** * * ** ** *** width;
*** * * * * *
** ** *** *** ** ** getHeight(){
***** ** ** * *** * * * height;
* * **** **

protected:
* *** * * *** ** ** width;
* * ******** * * height;

};



class Rectangle: public Shape

{

public:
* * * * * * ** * * getArea(){
* ** * * **** * ** ** ** **** *** *
*** ** * ** * **** *

};

class Triangle: public Shape

{

public:
*** ******** *** getArea(){
* * ** * * * * *** * * ** * * * ** ******* **
** * *** * ** *

};

int main(void)

{
* * ** ** * * *** Rect;
* ***** *** * * ** * *** * * *
*** ** * * * w,h;
* * *** ** *** * *** * *** ** ** * * ***
* * *** ** * * * * *
*** ** * * *** * ** *
***** *** ** *** * ** *** *
*** ** **** ***** * ** * * **
* *** * * * *** * * * *
*** *** * * * ** ** * * * *** * * ** ** ***** * * *** * * * * * ***** * ***** *** ** endl;

** *** ** * ** 0;

}
answered by (-384 points)
0 like 0 dislike
Hidden content!
#include *** **** * * ***

using namespace std;

// Base class

class Shape

{

public:


* * * * ** * * setWidth(int w)
** *** * **** *
* **** ***** * *** ***** * * * * = w;
*** ****** * * *
*** **** * * * *** ** *** ** h)
*** ** * **
* * **** * * ** * ** ***** * * * *** ** * *** ** = h;
*** ** * ** ***

protected:
** *** ** ** * * * width;
* * * * ** ** **** height;

};

// Derived classes

class Rectangle: public Shape

{

public:
*** * * * ** **** getArea()
* **** * *** *
* * *** ** ** ** ** ** * *** * * * ** ** **** * **
* * * *** **

};

class Triangle: public Shape

{

public:
** * *** **** * ** *** getArea()
* *** ** *** ** *** *
**** ** ** ** * * * * * * ***** **** * * * ** *** *
* ** ** *** *

};

int main(void)

{
* * ******** * * * *** *** * Rect;
**** * * * ** * * * * * * *
* *** * * ** ***** w,h;
* ** ** * *** * * * * ***** ** * *** * *
** * *** **** **** ***
** * ** * * * * * ***
** * ** ** * * * * *** * ** * ** * **
* *** * ** **** * *** **
* * ** ** *** ** **** *
* ** * ** **** *** * * * ** * ** * * * ** * ** ** *** * * *** * Tri.getArea() * ****** endl;
* * ** * * *** ** 0;

}
answered by (-364 points)
0 like 0 dislike
Hidden content!
#include * * * ** **

using namespace std;

// Base class

class Shape

{

public:
* * *** * Your code: pure virtual function * ** interface ** **
* * ** * ** ** * and **** * w) and * * * **** h) * here
* * ** * *** *** int *** * = 0;


** ** ** ***** * **** * w){
** ** * * ** ** * ** **** * *** ** * ** ** *** = w;
* **** ****** *
* * ** * ** ** * ** * * *** h){
** ** * * ** * * ** * * ** ** ** * * * = h;
* *** **** *** ** *


* *
* ** * ** * ** width;
* * ***** *** ** * height;

};

// Derived classes

class *** * public Shape

{

public:
* * **** * * *** ** Your code: ** **** ** *** **** ***
* * * * * *** * ** ***
* *** *** * * * ***** **** ****** * width * height;
* *** ***

};

class * * public Shape

{

public:
* ** *** ******** Your code: ** * * ** ** getArea()
*** *** ** *** *** * * **
* * ** * ** *** * ** * ** *** * ***** * * ** width * height / 2;
* ** * **** * ** ***

};

int * *

{
* * * ** *** ** Rect;
* *** ** *** ** **** * ***
** * * * * ** ** * w,h;
* ** **** * ** *** **** * * **** ** *
** * ** *** * * *** *
*** **** * * * *
* ** ***** * * * **** ** * **
** * * *** * * ** *
***** * * * * * ***** * *********
* * * ** * * ** ** * ***** ** * ** * * * ** ** * * *** ** *** * * * ** endl;
* * ** ** ** ** 0;

}
answered by (5.2k points)
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:162.159.115.9
©2016-2026

Related questions

0 like 0 dislike
15 answers
[Exercise] Coding (C) - asked Jun 1, 2017 in C++
ID: 24854 - Available when: Unlimited - Due to: Unlimited
| 3.8k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 5.8k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 1.3k views
12,783 questions
183,442 answers
172,219 comments
4,824 users