Programs - Source Code C++ switch control structure

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Switch: switch control structure with menu using int choice.

// - Menu with switch control structure.
#include <iostream>
using namespace std;
int main()
{
	int choice;

	cout << "MENU\n\n";

	cout << "1." << "\t" << "Lobster\n";
	cout << "2." << "\t" << "Steak\n";
	cout << "3." << "\t" << "Turkey\n";
	cout << "4." << "\t" << "Hamberger\n";
	cout << "5." << "\t" << "Vegetarian\n\n";

	cout << "Choose your dinner entree: ";
	cin >> choice;

	cout << endl;

	switch (choice)
	{
	case 1: cout << "Lobster is my favorite! Dig in!\n\n";
		break;

	case 2: cout << "Yummy! Steak is great...\n"
		     << "but limit yourself to once a week," << endl
		     << "or risk the chance of high cholesterol!\n\n";
		break;

	case 3: cout << "Turkey is healthier than steak! ...Enjoy!\n\n";
		break;

	case 4: cout << "Hamburger is another form of steak. :-)\n\n";
		break;

	case 5: cout <<  "Finally, a vegitarian is in the house!\n\n";
		break;

	default: cout << "Invalid number, please enter a number"
		      << " from the entrees above.\n\n";
		break;
	}
	return 0;
}
/*============================[output]==================================
MENU

1.      Lobster
2.      Steak
3.      Turkey
4.      Hamberger
5.      Vegetarian

Choose your dinner entree: 2

Yummy! Steak is great...
but limit yourself to once a week,
or risk the chance of high cholesterol!

Press any key to continue . . .
====================================[output 2]=========================
MENU

1.      Lobster
2.      Steak
3.      Turkey
4.      Hamberger
5.      Vegetarian

Choose your dinner entree: 6

Invalid number, please enter a number from the entrees above.

Press any key to continue . . .
======================================================================*/

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Using characters for switch control instead of int numbers.

// - Switch using characters.
#include <iostream>
using namespace std;
int main()
{
	char letter;

	cout << "A)\tHouse MD\n"
	     << "B)\tAmerican Idle\n"
	     << "C)\tFamily Guy\n\n";

	cout << "What TV show do you like (Enter A, B, C)?: ";

	cin >> letter;

	cout << endl;

	switch (toupper(letter))
	{
	case 'A' : cout << "Dr. House is a radical doctor!\n\n";
		break;
	case 'B' : cout << "Wannabe singers!\n\n";
		break;
	case 'C' : cout << "One of the craziest cartoons Ive ever seen.\n\n";
		break;
	default: cout << "Invalid choice.\n\n";
		break;
	}
	return 0;
}
/*============================[output]=================================
A)      House MD
B)      American Idle
C)      Family Guy

What TV show do you like (Enter A, B, C)?: a

Dr. House is a radical doctor!

Press any key to continue . . .
=============================[output 2]================================
A)      House MD
B)      American Idle
C)      Family Guy

What TV show do you like (Enter A, B, C)?: z

Invalid choice.

Press any key to continue . . .
======================================================================*/

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You could also use: if, else if, else statements, instead of using the switch control structure.

// - Menu using if, else if, else statements.
#include <iostream>
using namespace std;
int main()
{
	int num;

	cout << "MENU\n\n";
	cout << "1." << "\t" << "Lobster\n";
	cout << "2." << "\t" << "Steak\n";
	cout << "3." << "\t" << "Turkey\n";
	cout << "4." << "\t" << "Hamberger\n";
	cout << "5." << "\t" << "Vegetarian\n\n";
	cout << "Choose your dinner entree: ";
	cin >> num;

	cout << endl;

	if (num == 1)
		{
		   cout << "Lobster is my favorite! Dig in!\n\n";
		}

		else if (num == 2)
		{
		   cout << "Yummy! Steak is great...\n"
		        << "but limit yourself to once a week,\n"
		        << "or risk the chance of high cholesterol!\n\n";
		}

		else if (num == 3)
		{
		   cout << "Turkey is healthier than steak! ...Enjoy!\n\n";
		}

		else if (num == 4)
		{
		   cout << "Hamburger is another form of steak. :-)\n\n";
		}

		else if (num == 5)
		{
		   cout << "Finally, a vegitarian is in the house!\n\n";
		}

		else
		{
		   cout << "Invalid number, please enter a number"
		        << " from the entrees above.\n\n";
		}
		return 0;
}
/*=====================[output]=======================================
MENU

1.      Lobster
2.      Steak
3.      Turkey
4.      Hamberger
5.      Vegetarian

Choose your dinner entree: 5

Finally, a vegitarian is in the house!

Press any key to continue . . .
============================[output 2]================================
MENU

1.      Lobster
2.      Steak
3.      Turkey
4.      Hamberger
5.      Vegetarian

Choose your dinner entree: 0

Invalid number, please enter a number from the entrees above.

Press any key to continue . . .
======================================================================*/

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