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:172.70.80.171
©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
| 924 views
12,783 questions
183,442 answers
172,219 comments
4,824 users