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Oct 5th, 2006

Linking 2 files.

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Hi!

I have functions defined in ami.c and want to call them from friedman.c how do I link the 2?

Thanks
Ami

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amishosh

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Oct 5th, 2006

Re: Linking 2 files.

What compiler are you using?

Inanna

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Oct 5th, 2006

Re: Linking 2 files.

Borland C++ 3.1

amishosh

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Oct 5th, 2006

Re: Linking 2 files.

C Syntax (Toggle Plain Text)

C:\>bcc ami.c freidman.c

But that'll only work if freidman.c includes declarations for the functions. Otherwise it won't compile because it doesn't know that the functions exist. You can declare them directly or use a header file. The better way is to use a header file.

C Syntax (Toggle Plain Text)
/* ami.h */
#ifndef AMI
#define AMI
 
void function(void);
 
#endif
/* ami.h */
#ifndef AMI
#define AMI

void function(void);

#endif

C Syntax (Toggle Plain Text)
/* ami.c */
#include "ami.h"
 
void function(void)
{
  /* ... */
}
/* ami.c */
#include "ami.h"

void function(void)
{
  /* ... */
}

C Syntax (Toggle Plain Text)
/* freidman.c */
#include "ami.h"
 
int main(void)
{
  function();
  return 0;
}
/* freidman.c */
#include "ami.h"

int main(void)
{
  function();
  return 0;
}

Last edited by Inanna; Oct 5th, 2006 at 8:13 pm.

Inanna

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Oct 5th, 2006

Re: Linking 2 files.

Yea I know I need to declare.
Where exactly do I type:

C Syntax (Toggle Plain Text)

C:\>bcc ami.c freidman.c

Thanks
Ami

amishosh

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Oct 5th, 2006

Re: Linking 2 files.

At the command prompt. The path from the start button is something like Start->Programs->Accessories->Command Prompt.

Inanna

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Oct 5th, 2006

Re: Linking 2 files.

Yea that's what I thought.
I tried it it didn't recognize bcc.
I tried to go to the specific file directory and even the BorlanC directory. None of them worked.

I must be doing something worng.
Thanks
Ami

Last edited by amishosh; Oct 5th, 2006 at 9:14 pm.

amishosh

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Re: Linking 2 files.

I'm prolly forgetting the name of the executable. It might be bcc16 or bcc32 as well. Check the bin directory of where you installed the compiler and you'll see it.

Inanna

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Re: Linking 2 files.

Ok!
Yes it IS bcc.
I put the 2 files in the same directory as BIN and then ran:

C Syntax (Toggle Plain Text)

bcc file1.c file2.c

It opened a MS-DOS (Im using Win XP) window for a sec and closed. I assume it did something.
Now in file 2 I have this:

C Syntax (Toggle Plain Text)
/* file2.c */
#include <stdio.h>
int main()
{
extern int i;
/* get_j(void) is in file1.c */
int get_j(void);
 
 
printf("i == %d\n", ++i);
printf("j == %d\n", get_j());
return 0;
}
/* file2.c */
#include <stdio.h>
int main()
{
extern int i;
/* get_j(void) is in file1.c */
int get_j(void);
 
 
printf("i == %d\n", ++i);
printf("j == %d\n", get_j());
return 0;
}

It doesnt recognize "get_j". I diclared get_j in file1.c
Any idea why?

Thanks
Ami

Last edited by amishosh; Oct 5th, 2006 at 9:27 pm.

amishosh

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Oct 5th, 2006

Re: Linking 2 files.

Just a hunch, but try this and paste the error that you get.

C Syntax (Toggle Plain Text)
/* file2.c */
#include <stdio.h>
 
int get_j(void);
 
int main()
{
  extern int i;
 
  printf("i == %d\n", ++i);
  printf("j == %d\n", get_j());
 
  return 0;
}
/* file2.c */
#include <stdio.h>

int get_j(void);

int main()
{
  extern int i;

  printf("i == %d\n", ++i);
  printf("j == %d\n", get_j());

  return 0;
}

Inanna

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