mysql sdk;顺便调查有多少er在用这种方式访问mysql?

// mysqlCon.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include "winsock2.h"#pragma comment(lib,"./inc/libmysql.lib")#include "./inc/mysql.h"MYSQL _sql;bool updateUser(int userID,char *nickName){char cmd[256];sprintf(cmd,"update user set nickName='/%s/'where userID='/%d/'",nickName,userID);if(mysql_real_query(&_sql,cmd,strlen(cmd))!=0){return false;}return true;}bool insertUser(int userID,char *userName,char *nickName,char *pwd){char cmd[256];sprintf(cmd,"insert into user(userID,userName,nickName,pwd)values('/%d/','/%s/','/%s/','/%s/')",userID,userName,nickName,pwd);if(mysql_real_query(&_sql,cmd,strlen(cmd))!=0){return false;}return true;}bool insertIPMap(int userID,char *ip){char cmd[256];sprintf(cmd,"insert into ipmap(userid,ip)values('/%d/','/%s/')",userID,ip);if(mysql_real_query(&_sql,cmd,strlen(cmd))!=0){return false;}return true;}bool del(int userID){char cmd[256];sprintf(cmd,"delete from user where userid=/'%d/'",userID);if(mysql_real_query(&_sql,cmd,strlen(cmd))!=0){return false;}return true;}int _tmain(int argc, _TCHAR* argv[]){mysql_init(&_sql);if (mysql_real_connect(&_sql,"localhost","root","","lkdb",3306,0,0)){printf("connect ok/n");}int userid = 100002;if (insertIPMap(userid,"127.0.0.1")){printf("insert ipmap ok/n");}if (insertUser(userid,"m1","m1","123456")){printf("insert user ok/n");}//userid = 100001;if (updateUser(userid,"hello")){printf("update user ok/n");}system("pause");mysql_close(&_sql);return 0;}