i am developing a program which has a number of threads and many functions
previously the program had a header file and a main file so as a result the header file was becoming bigger and bigger.
so i decided to split its functionality among multiple .c files and .h files but when i do so i get a lot of
multiple declaration of function x sort errors
how can i overcome these . is there any tutorial on this..
/*****
One can't let go and still win
******/
You should then use header guards.
e.g.
#ifndef _FILENAME_H
#define _FILENAME_H
/* function declarations */
#endif
Look up a C++ Reference and learn How To Ask Questions The Smart WayOriginally Posted by Bjarne Stroustrup (2000-10-14)
Use this method while you are learning the in's and out's.
Create one header file, this will contain ALL function prototypes and any enums or typedefs you might have. Includes this header in all your .c files.
so you header might look like this:
Then your .c files would haveCode:#ifndef MYHEADER_H_ #define MYHEADER_H_ int foo (void); void bar (int *, char); #endif
One thing I like to do is to add comments in the header that specify which file the function is in. EX:Code:#include "myheader.h" /* ... */
Hopefully this helps.Code:#ifndef MYHEADER_H_ #define MYHEADER_H_ int foo (void); /* In foo.c */ void bar (int *, char); /* In bar.c */ #endif
> Create one header file, this will contain ALL function prototypes
One per .c file is much simpler to manage
The interface for foo.c is specified by foo.h
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
IMO For someone that is just starting off one .h is easier. Then you start moving into have a seperate .h for each .c
