0 like 0 dislike
2.5k 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
| 2.5k 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:172.71.178.167
©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
| 2.5k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 3.7k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 894 views
12,783 questions
183,442 answers
172,219 comments
4,824 users