GCC Warnings

I was trying to get rid of all of the warnings on my program so I compiled with

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gcc main.c -o main.exe -W -Wall -ansi

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I did this and corrected some things but now all that I have left is to get rid of the implicit declarations. I have a bunch of warnings such as

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main.c:421: warning: implicit declaration of function 'toupper'

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I have these for a few functions. How do I get rid of them?
~Sven

The warning means that the function is missing the corresponding protoype. In this case, the prototype for toupper() is in the header ctype.h

1. Read the manual page
man toupper

2. The response you get
TOUPPER(3) Linux Programmer’s Manual TOUPPER(3)

NAME
toupper, tolower - convert letter to upper or lower case

SYNOPSIS
#include <ctype.h>

3. Add the include files to the source code

4. rinse and repeat.

Now I am getting the same error for the sleep() function. What header file is this in?
~Sven

Sometimes, you have to specify the appropriate manual section

$ man sleep
$ man 2 sleep
No entry for sleep in section 2 of the manual
$ man 3 sleep

What do you mean? What is $ man???
~Sven

Why are you still programming?
Knowing what manual pages are, and how to read them is a fundamental part of the job.

Or maybe if you're using some glossy IDE, point your cursor at the function and press F1

I'm not going to sit here and spoon feed every single function you've guessed at just to tell you which header file you should be using.
If you haven't RTFM, how the hell do you know if you're even using it right?

I have googled the sleep function and found that it is in unistd.h but I have that included already and still get the error. I am not using Linux if the manual pages are something only in Linux. I have checked my IDE help and there is nothing there about specific functions.
~Sven

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gcc main.c -o main.exe -W -Wall -ansi

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So you're under Windows.

What about windows.h

Still getting the warning. Oh well, the program works so I guess I will just leave it.
~Sven

googled:

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If you're on Windows, include 'windows.h' and use void Sleep(DWORD milliseconds)
or DWORD SleepEx(DWORD dwMilliseconds, BOOL bAlertable)
I think microsoft also included 'sleep(time_t seconds)' in their version of stdlib.h

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http://www.free2code.net/plugins/for...w.php?f=3&p=77

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Originally Posted by 00Sven

Still getting the warning. Oh well, the program works so I guess I will just leave it.
~Sven

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Are you sure you included the correct filename, correctly spelt?
Sure you saved the file before recompiling it?

I just got rid of a dozen or so warnings and have none now :D

I found the easiest way to find the include file was to use
windows search to search in the include file directory in
/DJGCC.

Maybe try moving the include statement so it is one of the
first (after stdio.h)?

Anyway mine looks real neat now and 'real' errors don't
scroll of the screen.

I found a better solution, take sleep out of the program. It was pretty pointless in how it was used so now it is gone.
~Sven