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:162.159.115.10
©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