mysql api

MYSQL mysql;

mysql_init(&mysql);
std::string host = "127.0.0.1";
std::string user = "root";
std::string pswd = "admin";
std::string dbName = "qiandaohu";
unsigned int port = 3306;
if (mysql_real_connect(&mysql, host.data(), user.data(), pswd.data(), dbName.data(), port, NULL, 0))
{
mysql_query(&mysql, "SET NAMES GBK"); //设置编码格式
std::cout << "mysql connected!" << std::endl;
}
else
{
std::cout << "mysql connect failed!" << mysql_error(&mysql) << std::endl;
}

int res = mysql_query(&mysql, "select * from role");//查询
    if (!res)
    {
        MYSQL_RES *result = mysql_store_result(&mysql);
        if (result)
        {
            /*MYSQL_FIELD* sql_field = NULL;
            while (sql_field = mysql_fetch_field(result))
                std::cout << sql_field->name << "	";
            
            unsigned int cols = mysql_num_fields(result);*/
            MYSQL_ROW sql_row;
            while (sql_row = mysql_fetch_row(result))//获取具体的数据
            {
                RoleDB role;
                role.type = RoleType(atoi(sql_row[0]));
                role.name = sql_row[1];
                role.hp = atoi(sql_row[2]);
                roles.push_back(role);
                /*int idx = 0;
                while (idx < cols)
                    std::cout << sql_row[idx++] << "	";
                std::cout << std::endl;*/
            }
            mysql_free_result(result);
        }
    }
    else
    {
        std::cout << "query sql failed!" << mysql_error(&mysql) << std::endl;
    }