0 like 0 dislike
2.9k 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
| 2.9k 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:108.162.216.240
©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
| 4.4k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users