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:104.23.243.108
©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
| 3.9k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 5.9k 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