Question

(i) Create a class square with attribute (integer) length which defaults to 5. Provide member functions that calculate the perimeter (4 * length) and the area (length*length) of the triangle. Also provide set and get functions for the length attribute. The set function should verify that length is between 0.0 to 100. Your class should also provide a display function that draws the aquare using * character. For example, if length = 5, the display function should draw

            *****

            *****

            *****

            *****

            *****

   example filled square

when creating the display function, keep in mind that the length can vary and isn’t necessarily equal to 5 or any other number. Class definition and implementations should be in a header file (.h file) and source file(.cpp).

(ii) Write a main program that tests your square class. Create at least two objects, demonstrate set , get and display functions properly work. Submit you code and a sample run of your code.

(iii) Extend the class with methods that allow only the perimeter to be drawn and add a bool parameter that can be set to say if the square is filled or not and add a constructor to build either a filled on not filled square.

            *****

            *      *

            *      *

            *      *

            *****

   example unfilled square

Answer 1

This formula is for square not triangle .. There is mistake in our post.

Here is code:

#include <iostream>

using namespace std;

class Square

{

private:

int length = 5;

public:

Square(int l)

{

if (l > 0 && l < 100)

length = l;

else

cout << "Can't set the length" << endl;

}

int

getLength()

{

return length;

}

int

area()

{

return (getLength() * getLength());

}

int

perimeter()

{

return (4 * getLength());

}

void

draw()

{

for (int i = 0; i < getLength(); i++) {

for (int j = 0; j < getLength(); j++) {

cout << "*";

}

cout << endl;

}

}

void

drawPerimeter()

{

int l = getLength();

for (int i = 0; i < l; i++) {

for (int j = 0; j < l; j++) {

if (i == l - 1 || i == 0 || j == 0 || j == l - 1)

cout << "*";

else

cout << " ";

}

cout << endl;

}

}

};

int

main()

{

Square s1(6);

Square s2(12);

cout << "Length is " << s1.getLength() << ", Area is : " << s1.area() << ", Parameter is : " << s1.perimeter()

<< endl;

cout << "Length is " << s2.getLength() << ", Area is : " << s2.area() << ", Parameter is : " << s2.perimeter()

<< endl;

s1.draw();

cout << endl;

s1.drawPerimeter();

return 0;

}

Output:

Length is 6, Area is 36, Parameter is : 24 Length is 12, Area is 144, Parameter is :4 なななななな なななななな なななななな なななななな なななななな なななななな なななななな なななななな