0 like 0 dislike
2.8k 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
| 2.8k 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:172.69.59.83
©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
| 2.8k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 4.3k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 969 views
12,783 questions
183,442 answers
172,219 comments
4,824 users