First time using kbhit

I have no idea on how to do my program. What my should do is only let you type lower case letter and numbers, if you type caps it shouldn't show anything. If someone could help me out please?
Here's the code:

Code:

---

#include <stdio.h>
#include <conio.h>
#include <ctype.h>


main()
{
 printf("type");
    if(kbhit(isupper))
    {
        goto out;
    }
    out:
    getch();
    return 0;
}

---

thanks :)

Violence never solves anything. Try again when you're ready to use your keyboard properly.

Quote:

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Originally Posted by Barney McGrew

Violence never solves anything. Try again when you're ready to use your keyboard properly.

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sorry, im using translator English isn't my first language.

isupper is a function; you have to pass a character into it. Presumably you want to get that character from kbhit somehow.

Indeed. kbhit() is a function that accepts no arguments, and returns a value. It certainly does not have a mode to tell it to return only uppercase letters. isupper(), on the other hand, accepts a single argument, and returns an indication of if that argument is uppercase. Logically, those two functions can be used together somehow.


Note: kbhit() is also not standard C, but that's another story. There are ways to do what you want without using goto. Avoiding use of goto is often a good idea.

Quote:

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Originally Posted by grumpy

Indeed. kbhit() is a function that accepts no arguments, and returns a value. It certainly does not have a mode to tell it to return only uppercase letters. isupper(), on the other hand, accepts a single argument, and returns an indication of if that argument is uppercase. Logically, those two functions can be used together somehow.


Note: kbhit() is also not standard C, but that's another story. There are ways to do what you want without using goto. Avoiding use of goto is often a good idea.

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Thanks, you solved my problem. I didn't know that about kbhit :)

_kbhit

this link has some code on it that should help you

kbhit returns true when there is a input detected.