mysql学习

#include "include/mysql.h"
#include <iostream>
#include <assert.h>
int main()
{
    MYSQL mysql;
    //初始化
    mysql_init(&mysql);
    //连接
    assert(0 != mysql_real_connect(&mysql, "localhost", "root", "zzcan728", "whdb", 3306, NULL, 0));
    //查询
    char sql[1024] = {0};
    sprintf_s(sql, 1024, "SELECT `user_id`, `name`, `pic`, `vip`"
        "FROM `user`"
        "WHERE `user_id` = '1'");
    int code = mysql_real_query(&mysql, sql, strlen(sql));
    if (0 != code)   //非0查询失败  
    {
        printf("query failed! [%s] [%d] [%s] 
", sql, mysql_errno(&mysql), mysql_error(&mysql));
        return false;  
    }


    //保存查询结果
    MYSQL_RES* res = mysql_store_result(&mysql);
    MYSQL_ROW row;
    if (row = mysql_fetch_row(res))//检索结果集的下一行，如果没有的话返回null
    {
        
        unsigned long* lengths = mysql_fetch_lengths(res);//取得每一行中每个字段的内容长度
        for (int i = 0; i < mysql_num_fields(res); ++i)//获取行中字段数量
        {
            std::cout << row[i] << lengths[i] << std::endl;
        }
    }

    mysql_free_result(res);
    mysql_close(&mysql);
    getchar();
    return 0;
}