0 like 0 dislike
2.1k 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
| 2.1k 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:172.71.254.121
©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
| 2.1k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 3.1k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 663 views
12,783 questions
183,442 answers
172,219 comments
4,824 users