0 like 0 dislike
4.1k 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
| 4.1k 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
| 4.2k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 6.4k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 1.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users