Linking .h files with .c with #ifdef header guards

Question

im having trouble linking .h and .c files, i\'ve also read some threads regarding this problem and all of them is a bit vague and still i can\'t fully grasp the concept of i

Answer 1

You need to include b.h in all files that uses the structures that are defined in b.h. So you need to put a #include in both files. To avoid that b.h is loaded several times, you need the directives #ifdef. In your case:

b.h

#ifndef B_H
#define B_H

typedef struct{
    int x, y;
}myStruct;

void funct1(myStruct);
void funct2(myStruct);

#endif

and b.c:

#include "b.h"

void funct1(myStruct x)
{
    //do something
}

void funct2(myStruct y)
{
     //do something
}