cpp-programming/OOP2_Lab8/main.cpp at main · chiragtyagi2003/cpp-programming · GitHub

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#include <iostream>

#include <string>

#include <conio.h>

#include <time.h>

#include <Windows.h>

using namespace std;

double b;

double h; // global variables for base and height

// Functions for Main Menus

void F_First();

void F_Second();

// Base Class

class Shape

{ // Abstract class

protected:

double base;

double height;

public:

void get_data(double base, double height)

{

this->base = base;

this->height = height;

}

void virtual display_area() = 0; // pure virtual function

};

// Triangle class to calculate the area of triangle

class Triangle : public Shape

{

public:

void display_area()

{

cout << "Area of triangle: " << 0.5 * base * height << endl;

}

};

// Rectangle class to calculate the area of rectangle

class Rectanglee : public Shape

{

public:

void display_area()

{

cout << "Area of Rectangle: " << base * height << endl;

}

};

class Circle : public Shape

{

public:

void display_area()

{

cout << "Area of Circle: " << base * base * 3.1415 << endl;

}

};

int main()

{

for (int k = 0; k < 1000; k++)

{

system("cls");

cout << " M A I N M E N U\n"

<< "-------------------------------\n"

<< "1. First program\n"

<< "2. Second program\n"

<< "0. Exit\n"

<< "-------------------------------\n"

<< "Your choice: \n";

switch (_getch())

{

// First program

case 49:

F_First();

break;

// second program

case 50:

F_Second();

break;

default:

cout << " Your choice is not available in Menu.\n Please, enter one more time.\n";

Sleep(0700);

break;

case 48:

return 0;

break;

} // Switch

} // For loop

system("pause");

}

void F_First()

{

for (int k = 0; k < 1000; k++)

{

system("cls");

cout << " C A L C U L A T I N G A R E A S\n"

<< "-------------------------------------------\n"

<< "1. Triangle\n"

<< "2. Rectangle\n"

<< "0. Back\n"

<< "Your choice: \n";

switch (_getch())

{

// Case to Exit from the program

case 48:

{

system("cls");

main();

}

break;

// First program

case 49:

{

system("cls");

cout << " T R I A N G L E \n";

cout << "----------------------------------\n";

Shape *shape; //

Triangle triangle;

shape = &triangle; // overriding functions for triangle

cout << "Enter the base: ";

cin >> b;

cout << "Entet the height: ";

cin >> h;

shape->get_data(b, h);

shape->display_area();

cout << "-----------------------------------\n\n";

system("pause");

}

break;

// second program

case 50:

{

system("cls");

cout << " R E C T A N G L E \n";

cout << "----------------------------------\n";

Shape *shape; //

Rectanglee rectangle;

shape = &rectangle;

cout << "Enter the base: ";

cin >> b;

cout << "Entet the height: ";

cin >> h;

shape->get_data(b, h);

shape->display_area();

cout << "------------------------------------\n\n";

system("pause");

}

break;

default:

{

cout << "Your choice is not available in Menu.\nPlease, enter one more time.\n";

Sleep(0700);

}

break;

} // Switch

} // For loop

system("pause");

}

void F_Second()

{

for (int k = 0; k < 1000; k++)

{

system("cls");

cout << " S E C O N D P R O G R A M\n"

<< "-------------------------------------\n"

<< "1. Triangle\n"

<< "2. Rectangle\n"

<< "3. Circle\n"

<< "0. Back\n"

<< "Your choice: \n";

switch (_getch())

{

// Case to Exit from the program

case 48:

{

system("cls");

main();

}

break;

// First program

case 49:

{

system("cls");

cout << " T R I A N G L E \n";

cout << "----------------------------------\n";

Shape *shape; //

Triangle triangle;

shape = &triangle; // overriding functions for triangle

cout << "Enter the base: ";

cin >> b;

cout << "Entet the height: ";

cin >> h;

shape->get_data(b, h);

shape->display_area();

cout << "-----------------------------------\n\n";

system("pause");

}

break;

// second program

case 50:

{

system("cls");

cout << " R E C T A N G L E \n";

cout << "----------------------------------\n";

Shape *shape; //

Rectanglee rectangle;

shape = &rectangle;

cout << "Enter the base: ";

cin >> b;

cout << "Entet the height: ";

cin >> h;

shape->get_data(b, h);

shape->display_area();

cout << "------------------------------------\n\n";

system("pause");

}

break;

// Third program

case 51:

{

system("cls");

cout << " C I R C L E \n";

cout << "----------------------------------\n";

Shape *shape; //

Circle circle1;

shape = &circle1;

cout << "Enter the radius: ";

cin >> b;

shape->get_data(b, 0.0);

shape->display_area();

cout << "------------------------------------\n\n";

system("pause");

}

break;

default:

{

cout << "Your choice is not available in Menu.\nPlease, enter one more time.\n";

Sleep(0700);

}

break;

} // Switch

} // For loop

system("pause");

}

cpp-programming/OOP2_Lab8/main.cpp at main · chiragtyagi2003/cpp-programming · GitHub

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