0 like 0 dislike
2.4k 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
| 2.4k 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:172.71.254.236
©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
| 2.4k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 3.5k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 755 views
12,783 questions
183,442 answers
172,219 comments
4,824 users