C语言连接mysql数据库，读取mysql内容

 //linux下编译g++ $(mysql_config --cflags)  ***.cpp  $(mysql_config --libs)

/*mysql数据库中表的内容
mysql> select * from maindb;
+------------------+---------+-------------+---------+----------+---------------------+---------------------+---------------------+--------------------+
| id               | leixing | wenjianming | zhanhao | zhanming | scsj                | clsj                | sxsj                | baowen             |
+------------------+---------+-------------+---------+----------+---------------------+---------------------+---------------------+--------------------+
| 0000000000003215 | sp      | sp321654    |      12 | fuzhou   | 0000-00-00 00:00:00 | 0000-00-00 00:00:00 | 0000-00-00 00:00:00 | oiyhjkghjdgfskdjfh |
| 0000000000003216 | NULL    | pet.txt     |     256 | 福州            | 1970-01-01 08:04:16 | NULL                | 1970-01-01 08:09:08 |$
                                                                                                                                                    |
| 0000000000003217 | NULL    | pet.txt     |     256 | 福州            | 1970-01-01 08:04:16 | NULL                | 1970-01-01 08:09:08 |$
                                                                                                                                                   |
+------------------+---------+-------------+---------+----------+---------------------+---------------------+---------------------+--------------------+
3 rows in set (0.00 sec)

*/
#include
#include

int main() {
MYSQL *conn;
MYSQL_RES *res;
MYSQL_ROW row;

char *server = "localhost";/*服务器名*/
char *user = "root";/*用户名*/
char *password = "123"; /* 此处改成你的密码 */
char *database = "mysql";/*数据库名*/

conn = mysql_init(NULL);

/* Connect to database */
if (!mysql_real_connect(conn, server,user, password, database, 0, NULL, 0)) {
fprintf(stderr, "%s/n", mysql_error(conn));
return 1;
}

/* send SQL query */
if (mysql_query(conn, "select * from maindb where zhanhao=256")) {//sql语句
fprintf(stderr, "%s/n", mysql_error(conn));
return 1;
}

res = mysql_use_result(conn);//保存查询结果

/* output */

while ((row = mysql_fetch_row(res)) != NULL)
{
    for(int i=0;i<9;i++)    
        printf("%s ", row[i]);
    printf("/n");
}

/* close connection */
mysql_free_result(res);
mysql_close(conn);
}