0 like 0 dislike
3.5k 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
| 3.5k 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:104.23.197.64
©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
| 3.5k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 5.3k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 1.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users