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:172.70.111.199
©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
| 979 views
12,783 questions
183,442 answers
172,219 comments
4,824 users