switch case

**threahdead** · 09-30-2002

hi everyone
i was discovering a problem while making a menu for C.

i tried to start the programm as follows:

main ()

{
printf("Choose:\n");
printf("1. Internet\n");
printf("2. LAN\n");
printf("3. Linux\n");
printf("4. Windows\n");
}

i know that i missed it putting in the include files. but my question is how to define the variables.
i would do it as it follows:

{
int a, b, c, d; /* for the different inputs like press 1, 2 and so on....*/

i guess its wrong cause my compiler didnt like it.
how do i define these variables?
and how do i make a switch case for the four ones in here?
maybe like this?

switch
case 1: printf("you selected blabla");
case 2: printf("you selceted bla");

any help is welcome
threadhead

**Shiro** · 09-30-2002

Hope this helps something:

Code:

int input;

input = get_input ();

switch (input)
{
    case 1:
        /* Do something */
        break;
    case 2:
        /* Do something */
        break;
    ....
    default:
        /* Do something */
        break;
}

**threahdead** · 09-30-2002

with the line

'int input;' you define the variable right?

but what do you with?

'input = get_input ();'

**Hammer** · 09-30-2002

>>'input = get_input ();'
This is a call to a function that gets input from somewhere and assigns it to the input variable. It's a made up name use purely for the example. You can of course write a function called getinput(), which is what you would normally do.

**quzah** · 09-30-2002

Originally posted by Hammer
>>'input = get_input ();'
This is a call to a function that gets input from somewhere and assigns it to the input variable. It's a made up name use purely for the example. You can of course write a function called getinput(), which is what you would normally do.

I'm amazed at how many times I'm asked to explain my use of something similar.

Quzah.

**Shadow** · 09-30-2002

Code:

#include <stdio.h>

int PrintMenu ( void );

int main ( void )
{
	char choice;
	while ( PrintMenu() == 0 )
	{
		choice = getchar();
		switch ( choice )
		{
			case '1': printf("To be, or not to be.\n\n"); break;
			case '2': printf("Hello, world.\n\n"); break;
			case 27: printf("Closing.."); exit(0); break;
			default: break;
		}
	}
	return 0;
}

int PrintMenu ( void )
{
	printf("Choose a message to print:\n\n");
	printf("1.  To be, or not to be.\n");
	printf("2.  Hello, world.\n\n");
	printf("Escape exits.\n\n");
	return 0;
}

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