1)初始化一个连接句柄
2)建立连接
所用到的函数如下:
MYSQL *mysql_init(MYSQL *connection) // 初始化连接句柄
//成功返回MySQL结构指针,失败返回NULL
MYSQL *mysql_real_connect(MYSQL *connection,
const char *server_host,
const char *sql_user_name,
const char *sql_password,
const char *db_name,
unsigned int port_number,
const char *unix_socket_name,
unsigned int flags) //建立连接
//成功返回MySQL结构指针,失败返回NULL
以下是完整实例:
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <mysql/mysql.h>
using namespace std
void mysql_err_function(MYSQL * connection)
int main()
{
//freopen("input.txt","r",stdin)
MYSQL * connection
connection = mysql_init(NULL)
if (!connection)
{
cout <<"mysql_init failed!" <<endl
exit(-1)
}
if (!mysql_real_connect(connection,"localhost","root","123456","test",0,NULL,0))
{
cout <<"Connection To MySQL failed!" <<endl
mysql_err_function(connection)
}
cout <<"Connection To MySQL Server is Success..." <<endl
string str
getline(cin,str)
int res = 0
int affected_count = 0
while (str != "close" &&str != "" &&!res)
{
res = mysql_query(connection,str.c_str())
affected_count += mysql_affected_rows(connection)
if (res)
{
if (mysql_errno(connection))
{
cout <<"Error " <<mysql_errno(connection) <<" : "
<<mysql_error(connection) <<'\n' <<endl
break
}
}
getline(cin,str)
}
cout <<"Have affected " <<affected_count <<" rows!" <<endl
mysql_close(connection)
cout <<"Connection To MySQL Server is closed..." <<endl
return 0
}
void mysql_err_function(MYSQL * connection)
{
if (mysql_errno(connection))
{
cout <<"Error " <<mysql_errno(connection) <<" : "
<<mysql_error(connection) <<endl
exit(-1)
}
}
c语言不能连接数据库,只能用文件保存数据;我在学习的时候也曾遇到过这样的问题,请教老师,老师告诉我C语言主要用来开发系统的,还有就是用来开发游戏的。一般用文件保存数据。不会用到数据库;
要用数据库的语言有VB,java,c#,Dephi等等
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)