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Yanroy

Making Library Files

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I have codewarrior 3.1 for win98. I wrote a sample library just to see if I could make a .lib file before I started my project.... It doesn''t work. I chose the linker to be lib, and the output file to be .lib. I then wrote a simple function called hello() that prints hello world on the screen. To compile this, I needed to include iostream.h. This all worked fine. I then made a new project, added my test.lib file to it, and in the main() declaration I added the line hello(); The compiler says it is an undeclared something or other. I have used many libraries before (such as winsock) and they all work fine. The codewarrior documentation says I am doing everything right... I really need to be able to make a library file for my new project. If you have any thoughts or know what I am doing wrong, please help! --------------------

You are not a real programmer until you end all your sentences with semicolons;

Yanroy@usa.com

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You haven't declared the function. When you used the Winsock library you included a header file (.h) didn't you? You need to do the same thing with your own lib (make a header file with the function prototype and then include it in your .cpp file).

Example:

// my_lib.h

#ifndef __MY_LIB_H_
void hello(void);
#endif

// source_file.cpp

#include "my_lib.h"

main()
{
hello();
}

And when you add more functions to your lib you just add the prototype to the my_lib.h file.

/. Muzzafarath

Edited by - Muzzafarath on 3/31/00 8:34:27 AM

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Actually, I tried that too. That just gave me the error illegal function definition or something like that. I also tried it with a class and got similar results. I have played with the link order too. Makes no difference what I do... there must be something basic I am doing wrong.

--------------------


You are not a real programmer until you end all your sentences with semicolons;

Yanroy@usa.com

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