Thread: Problem with two set of functions..

I have designed a set of functions to handle structured table in a file. You can say a small DBMS. It has quick search, addrecord, delete record, modify record concurrency control and recovery features.

I just have to change the structure and
read_record()
write_record()
......................
and few other functions.

Now the problem is, I need to work with two table (structure) / DB at a time. It's working saperately..

Global variables, typedef struct PINFO RECORD are giving problem.

Any one have suggestion?.. least effort to continue.

>>Any one have suggestion?..
Nothing definate without better understanding how your code works, but here are some thoughts:

- Using two files - use two FILE* variables
- Using two structures - make an array or list of stuctures. Maybe have two link lists?

>Global variables
Try to avoid them where possible. Create your variables locally, and pass them as function parameters.

>typedef struct PINFO RECORD
Why is this giving you a problem?

>typedef struct PINFO RECORD
Why is this giving you a problem?
Ohh.... RECORD is the struct used in all other functions.

>>RECORD is the struct used in all other functions.
Well, according to what you showed me, it isn't an actual structure, it's a typedef for one:
>typedef struct PINFO RECORD

So, again, why does it cause you a problem?

Okay...

SET1:

Code:

file: def.h
#define FILE_NAME  "file.db"
#define INDEX_FILE  "file.dx"

struct PINFO{
char     string[33];
int        number;
}

typedef struct PINFO RECORD;

file: function.h

int fun_a(RECORD *db)
{

}


RECORD * fun_b()
{

}


file: fun_pinfo.h

int writerecord(char *fname)
{

}

int readrecord(char *fname)
{

}

int displayrecord(RECORD *db)
{


}

SET2:

Code:

file: def2.h

#define FILE_NAME  "file2.db"
#define INDEX_FILE  "file2.dx"

struct DEMO{
int        number;
int        status;
char     name[33];
}

typedef struct DEMO RECORD;


file: function2.h

int fun_a(RECORD *db)
{

}


RECORD * fun_b()
{

}



file: fun_demo

int writerecord(char *fname)
{

}

int readrecord(char *fname)
{

}

int displayrecord(RECORD *db)
{


}

Now how can I use this code?
It works separately with few modifications in func_*h, def*.h only.


Except system("");
How can I use this two set in the same application.

>typedef struct PINFO RECORD;
>typedef struct DEMO RECORD;
Two typedefs to the same name? Why not change them to be unique?

Then I canot use common functions for the application. I have to change all of them.

Actually.... I want to a method to make both as unique.
There could be two saperate functions through which the application will work, pass record as parameter. Such as two object. Just if any brilliant idea. Actually I missed it (that I have to work with two unit in a single app. and they will make problem) before I code.

You know I can make it work through system("");