Help with Array.

Code:

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    printf("\t\tPlease Choose:\n");
    printf("\t\t[S]ales\n");
    printf("\t\t[P]ayment\n");
    printf("\t\t[E]xit\n");
    printf("\t\tYour choice: ");
    scanf(" %c", &choice);


    while (choice != 'S' && choice != 's' && choice != 'P' && choice != 'p' && choice != 'E' && choice != 'e')
    {
        printf("\n\t\t*WARNING* INVALID INPUT\n\t\tPlease input your choice correctly: ");
        scanf(" %c", &choice);
    }

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How do I change the line :

Code:

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while (choice != 'S' && choice != 's' && choice != 'P' && choice != 'p' && choice != 'E' && choice != 'e')

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into an Array?

For example,

Code:

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char valid[] = {'S', 's', 'P', 'p', 'E', 'e'};

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Then I call valid instead of using the long code? ;O

man page strchr section 3
Like
while ( strchr("SsPpEe",choice) == NULL )

Or if you don't care about case,
while ( strchr("SPE", toupper(choice) ) == NULL )

Code:

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while ( strchr("SPE", toupper(choice) ) == NULL )

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What is toupper mean? ;O It include the 's' 'p' 'e'?

Another question :
How do I make my program delay for a few second? sleep(1) seem like don't work for me..
I included <windows.h> but it display "No target architecture" Error.

Quote:

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Originally Posted by Milo Juak MuTou

Another question :
How do I make my program delay for a few second? sleep(1) seem like don't work for me..
I included <windows.h> but it display "No target architecture" Error.

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You could use time.h and count time :)
However sleep is much more appropriate.Maybe sleep(1) is too short ,so try sleep(5) and your program is going to stall for 5 seconds
Or you could use function wait
http://www.gidforums.com/t-11552.html

Quote:

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Originally Posted by Milo Juak MuTou

What is toupper mean? ;O It include the 's' 'p' 'e'?

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Aww ... cmon! It would take only a tiny effort on your part to find an answer to that question. Either online (googling toupper will find relevant information) or in even basic texts on C describe it.

toupper(choice) converts the value of choice to something else. What do you think the "upper" would mean in the context of characters??

Quote:

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Originally Posted by Milo Juak MuTou

How do I make my program delay for a few second? sleep(1) seem like don't work for me..
I included <windows.h> but it display "No target architecture" Error.
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Techniques to delay a program are compiler and system dependent. sleep() typically works with compilers/libraries under unix. Sleep() is the function in the win32 API. The case difference is important in C.

If you want a portable technique, it is possible to loop checking time, until some period has passed. That technique is not generally recommended, however, as it consumes CPU cycles .... which is not a good idea with modern multi-tasking operating systems, as it affects the behaviour and responsiveness of both the host system and other running programs. The non-portable functions like sleep or Sleep() (depending on your operating system) are better, as they introduce a delay in a manner that has less impact on the host system or on other running programs