0 like 0 dislike
3.1k 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
| 3.1k 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:108.162.241.32
©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
| 3.1k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 4.7k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 1.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users