MYSQL C API : mysql_real_connect()

MYSQL * mysql_real_connect(

MYSQL *mysql,
const char *host,
const char *user,
const char *passwd,
const char *db,
unsigned int port,
const char *unix_socket,
unsigned long clientflag);

// 连接到MYSQL 数据库服务器 在头文件mysql.h 中声明
// 参数的说明请参考百度百科

代码范例：

#include <iostream>
#include <mysql.h>
#include <string>

#include <assert.h>

int main()
{
    MYSQL *ms_conn = mysql_init(NULL);
    if (ms_conn == NULL)
    {
        std::cout << "Error: mysql_init failed." << std::endl;
        return 0;
    }
    std::cout << "Info: mysql_init successful." << std::endl;

    MYSQL *ms_res = NULL;
    ms_res = mysql_real_connect(ms_conn, "localhost", "root", "123456", 
            "db_name", 0, NULL, 0);
    if (ms_res == NULL)
    {
        std::cout << "Error: connect mysql failed: " << mysql_error(ms_conn) << std::endl;
        mysql_close(ms_conn), ms_conn = NULL;
        return 0;
    }
    std::cout << "Info: mysql connect successful." << std::endl;

    // ... // 其他操作
    
    // 使用完释放系统资源
    mysql_close(ms_conn), ms_conn = NULL;
}