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C language => Expert questions => Topic started by: delper on June 22, 2008, 06:34:09 AM

Title: struct declaration in multiple files ...
Post by: delper on June 22, 2008, 06:34:09 AM

Hi C Wizards,

     How can I declare a typedef struct in one file and use it in another?   

In one file I have:

typedef struct tagpair {
   int Row;
   int Column;
} pair;

and I like to use the tagpair struct in other files, even as input parameter in prototypes:

float *DotSUM (float DC, pair Ele, float MatrixIN[][Ele.Column], float MatrixOUT[][Column]);

But I just don't know what to declare in the other file, since the

extern struct pair;

does not work.... So what is the magic incantation here? 

Title: Re: struct declaration in multiple files ...
Post by: JohnF on June 22, 2008, 08:29:04 AM

Put the struct definition in a .H file and include said .H file in any .C file that needs it.

John