0 like 0 dislike
2.5k 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
| 2.5k views

17 Answers

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

using ** std;

// Base class

class Shape

{

public:
* * *** **** * ** * Your code: pure virtual function * * **** ***
* ** * ** * * * ** *** and *** *** ** w) and *** * * h) * * here
*** * ** * * ** w){width = w;}
*** ** ** * **** * *** = h;}
* * *
* * * **** * *** * * width;
* * ** ** height;

};

// Derived classes

class * * public Shape

{

public:
** *** ** ** * * Your code: * * * * ***** ** *
* **** * * *** * **** ** area;
* * ** * * *** ***** ** * = * ****
*** **** ** ** * ** * **** * area;
**** *** * * * *

};

class **** public Shape

{

public:
** * * * *** ** *** Your code: ** * * ** * **
***** *** * * **** * * *
****** * * * * * ** * area;
** * ** * * ** * * ** = (width * *****
* * ** * ** **** * area;
* * *** ** *

};

int * *

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

}
answered by (-298 points)
0 like 0 dislike
Hidden content!
#include * * * *******

using *** * * std;

// Base class

class Shape

{

public:
** * * *** Your code: pure virtual function ** * *** * * *
* * ** * ** * * *** *** and * * w) and * h) *** here
* * * * * ** *** ** * * * w){width = w;}
* ** * * ** * * = h;}
* *****
** ** **** * * width;
* **** * ** * *** height;

};

// Derived classes

class * * public Shape

{

public:
* * * * * * ** * ***** Your code: * * * *** * * *
* * * ***** * * * * ** ** area;
*** ** ** * * ** * * ** * = ** *
* * * ****** ** ****** * area;
** * ** * **** *

};

class * * * public Shape

{

public:
*** *** * ***** * Your code: * * * *** **
* *** * **** **** * ******
** *** ** * * * * * * area;
* *** * *** *** *** = (width * * * *
*** *** * * * ** * * * *** * area;
* * * *** * *

};

int * * *

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

}
answered by (-215 points)
0 like 0 dislike
Hidden content!
#include * ** * ****

using * ** std;

// Base class

class Shape

{

public:
* *** ***** * * ** Your code: pure virtual function ** * ** * ** **** *
*** *** * * ** ** and ** * w) and * * ** h) **** here
* * * ** ** ** * ** ** w){width = w;}
** * ***** *** *** ** *** = h;}
* **
** ***** * * * * * width;
*** **** **** * ** height;

};

// Derived classes

class * *** public Shape

{

public:
* ******* * ** ** * Your code: * * * ** ** ** * ****
*** ** * * * * * * * * area;
** **** * * *** * * ** = *****
* * *** **** * * ** * ** area;
** *** *** *

};

class ***** public Shape

{

public:
** * * *** ** Your code: ** ** * ** * ****** ** ***
** * *** *** *** *** *
* **** * ** ** * **** ** area;
** **** * ******* * * **** = (width * * **
**** ** ********* *** * * area;
* * *** ** *** * **

};

int *****

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

}
answered by (237 points)
0 like 0 dislike
Hidden content!
#include ** ****** *

using *** * std;

// Base class

class Shape

{

public:
** * ** * ***** Your code: pure virtual function * ** *** *** ** * *
* *** * ***** * ** * * and * * **** w) and ** h) * **** here
** * ********* ***** * **** w){width = w;}
*** * ****** *** * *** ** ** = h;}
*** **
** **** * **** * * width;
* ** ** * * * * height;

};

// Derived classes

class public Shape

{

public:
** ** ** * *** * * Your code: * * * **** * * **
* * ** ** ** * ** * *** area;
** * **** * * ** = * * * **
*** * * * * * *** **** area;
* * * * * * * *

};

class ** ** public Shape

{

public:
*** * * **** Your code: ** ** ****** * * * * * * ***
**** * ** **** *** * *
****** *** *** * * ** * * ** area;
** * ** *** *** **** *** = (width * ** * *
** * * * ** ** * area;
* ** * ** * * ** ***

};

int *** *

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

}
answered by (126 points)
0 like 0 dislike
Hidden content!
#include **** ***



using *** std;



class Shape

{
* * **
***** ** *** ** ***** * * width, height;

public:
*** * ** ** * * * * *** set_data (float a, float b)
** * **** * ** * *** ** *
* * *** ** ** * * *** * * * ** ** * * * = a;
** ** * * ** * *** * * ** *** * **** * ** = b;
*** ***** * **** * * **

};



class * * public Shape

{

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

};



class ** * public Shape

{

* ** * * *** **** * *** area ()
** *** ***** * *******
** * ** ** **** * * ** ** * ** * *** * (width * height / 2);
** ** *** **** ***** * * ***

};



int main (){
* * * ** ** ***
** ****** * ** ** * * rect;
**** * * ** ** * ***** *** tri;
* *** * * * *** * * * * ** (5,3);
* * ** * * * * ** * * (2,5);
* ** ***** * * *** **** ** ** * *** * *** * * * ** ***** ** * * * * * * * * * endl;
*** * * * * * *** * * 0;

}
answered by (-298 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 (-249 points)
0 like 0 dislike
Hidden content!
#include * * ***** **

using namespace std;

// Base class

class Shape

{

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

};

// Derived classes

class * * *** public Shape

{

public:
* ** * * * * ** * Your code: * * * ** * *** *
**** * ** * *** * *
* * * * ** * * *** * * ** * ** * * * * ** *
** *** ** * * ****

};

class Triangle: public Shape

{

public:
** * * ** * ** ****** Your code: ***** * * ** * **
* ** ** * ** * * * * *
* * * * * *** **** * * ***** * *** ** * *** * **
* *** **

};
**

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

}

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

}



int ** **

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

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

}
answered by (-136 points)
0 like 0 dislike
Hidden content!
using ** * * std;

// Base class

class Shape

{

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

};

// Derived classes

class * ** public Shape

{

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

};

class *** ** public Shape

{

public:
*** * * * * * * Your code: *** * * * * * ** *
* * * * * ***** **** ** *
* * * * ** * *** ** ** ** * ** ***** * * * * **** *
** * ** ** * ** ** *

};
****

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

}

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

}



int * ** *

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

* * **** * ** 0;

}
answered by (-136 points)
0 like 0 dislike
Hidden content!
#include ** * ***** **

using * * std;

// Base class

class Shape

{

public:
** * *** * * Your code: pure virtual function * * *** ****
* *** ** *** * and * * * w) and **** ** h) * * here
* * ** * * **** *** * ** ** w){width = w;}
** ** ** *** * = h;}
* ***
*** * ** * * **** width;
* ** * * ***** height;

};

// Derived classes

class * public Shape

{

public:
* * * ** * Your code: ***** ***** ****** ** * *
*** ***** * ***** * *** * area;
**** * ***** ** ******* = ** ** *
****** * ** * **** * area;
* * * ***** **

};

class ** * public Shape

{

public:
***** *** ***** Your code: * *** ** *** * ** *
** * ** * * *
** * * * * * **** * * area;
* * * *** ** *** **** *** = (width * *** * *
* * *** ** * * * * * * area;
*** **** ** * *

};

int ****

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

}
answered by (-189 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 (-368 points)
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.70.179.156
©2016-2025

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
| 2.5k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 3.7k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 892 views
12,783 questions
183,442 answers
172,219 comments
4,824 users