0 like 0 dislike
3.5k 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
| 3.5k 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:162.159.115.31
©2016-2026

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
| 3.5k views
0 like 0 dislike
27 answers
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24389 - Available when: Unlimited - Due to: Unlimited
| 5.3k views
0 like 0 dislike
1 answer
[Exercise] Coding (C) - asked Apr 27, 2017 in C++
ID: 24390 - Available when: Unlimited - Due to: Unlimited
| 1.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users