0 like 0 dislike
2.8k 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
| 2.8k 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:172.68.245.115
©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
| 2.9k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 4.3k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 995 views
12,783 questions
183,442 answers
172,219 comments
4,824 users