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:172.69.130.53
©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
| 923 views
12,783 questions
183,442 answers
172,219 comments
4,824 users