Two things:
1)
Code:
#include <sql.h>
#include <sqlext.h>
#include <sqltypes.h>
I think it should be:
Code:
#include "sql.h"
#include "sqlext.h"
#include "sqltypes.h"
Check where your headerfiles are.
Secondly:
include <stdio.h>
should be
#include <stdio.h>