0 like 0 dislike
2.7k 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
| 2.7k 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:108.162.216.239
©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
| 4.2k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 960 views
12,783 questions
183,442 answers
172,219 comments
4,824 users