0 like 0 dislike
2.6k 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
| 2.6k 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:172.69.59.97
©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
| 2.6k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 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
| 928 views
12,783 questions
183,442 answers
172,219 comments
4,824 users