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:108.162.216.251
©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
| 922 views
12,783 questions
183,442 answers
172,219 comments
4,824 users