0 like 0 dislike
3.5k 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
| 3.5k 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:104.23.243.165
©2016-2026

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
| 3.6k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 5.4k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 1.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users