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:162.159.115.32
©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