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:172.71.178.166
©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