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:172.69.214.39
©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
| 2.8k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 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
| 993 views
12,783 questions
183,442 answers
172,219 comments
4,824 users