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not sure why i'm getting this error when trying to connect to a database with C++ and mySQL
Posted by: Cory Sanchez
Date: January 21, 2007 07:21PM

I get the following problems when trying to connect to a database that is locally on my machine...
#include <mysql.h>
#include <winsock>
#include <iostream>
using namespace std;

MYSQL* mysqlConnection = mysql_init(NULL);

if (!mysql_real_connect(mysqlConnection, "localhost", "root", "pw", "tutorialdb", 3306, NULL, 0))
//error, use mysql_error(mysqlConnection)
else
{
if (mysql_query(mysqlConnection,"SELECT * FROM blah") != 0)
//error, use mysql_error(mysqlConnection)
else
{
MYSQL_RES* result = mysql_store_result(mysqlConnection);

MYSQL_ROW row;
// get the rows 1 by 1
while ((row = mysql_fetch_row(result)))
{
// do stuff
// row[0] is the contents of col1 of the current row
// row[1] is the contents of col2 etc
}

mysql_free_result(result);
}

mysql_close(mysqlConnection);
}


The database I created with mySQL 5.0 command line, with the following:
Enter password: ********
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1 to server version: 5.0.27-community-nt

mysql> create database tutorialdb
-> ;
Query OK, 1 row affected (0.00 sec)

mysql> use tutorialdb;
Database changed
mysql> CREATE TABLE player (
-> num integer auto_increment not null,
-> name varchar(100) default '' not null,
-> primary key(num),
-> unique(name)
-> );
Query OK, 0 rows affected (0.09 sec)

mysql>
mysql> CREATE TABLE resource (
-> num integer auto_increment not null,
-> name varchar(100) default '' not null,
-> primary key(num),
-> unique(name)
-> );
Query OK, 0 rows affected (0.06 sec)

mysql>
mysql> CREATE TABLE playerresource (
-> player integer default 0 not null,
-> resource integer default 0 not null,
-> amount integer default 0,
-> primary key(player, resource)
-> );
Query OK, 0 rows affected (0.06 sec)

mysql>


Here are my errors:
Code:
1>------ Build started: Project: sss, Configuration: Debug Win32 ------
1>Compiling...
1>fggf.cpp
1>c:\mysql\include\mysql_com.h(184) : error C2146: syntax error : missing ';' before identifier 'fd'
1>c:\mysql\include\mysql_com.h(184) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\mysql\include\mysql_com.h(184) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\mysql\include\mysql_com.h(354) : error C2065: 'SOCKET' : undeclared identifier
1>c:\mysql\include\mysql_com.h(354) : error C2146: syntax error : missing ')' before identifier 's'
1>c:\mysql\include\mysql_com.h(355) : error C2059: syntax error : ')'
1>.\fggf.cpp(2) : fatal error C1083: Cannot open include file: 'winsock': No such file or directory
1>Build log was saved at "file://c:\Documents and Settings\Mr. Coffee\My Documents\Visual Studio 2005\Projects\sss\sss\Debug\BuildLog.htm"
1>sss - 7 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========


Any ideas waht i'm doing wrong? they are all coming from a mySQL library named,mysql_com.h

Thanks.
i'm using Visual Studio 2005



Edited 1 time(s). Last edit at 01/21/2007 09:34PM by Cory Sanchez.

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not sure why i'm getting this error when trying to connect to a database with C++ and mySQL
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January 21, 2007 07:21PM


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