服務器-2 服務器對數據庫進行增刪查改操作

mysql.h

#include<stdio.h>
#include<mysql.h>


struct Sql
{
        MYSQL mysql;
        MYSQL_RES *res;
        MYSQL_ROW *row;

        int connect;
        int select;
        int flag;
}Sql;

void Mysql_init(struct Sql *mysql);
void Mysql_destroy(struct Sql *mysql);
void Mysql_select(struct Sql *mysql,char *query);
void Mysql_add(struct Sql *mysql,const char * value);
void Mysql_del(struct Sql *mysql,const char * value);
void Mysql_update(struct Sql *mysql,const char * username,const char* passwd);

mysql.c

#include<string.h>

#include"mysql.h"

#define True    1
#define Fault   0

void  Mysql_init(struct Sql *mysql)
{

        mysql_init(&mysql->mysql);
        if(!mysql_real_connect(&mysql->mysql,"localhost","root","mohican123.","login",0,NULL,0))
        {
                mysql->connect = Fault;
                printf("Failed\n");
        }
        else
        {
                mysql->connect = True;
                printf("OK\n");
        }

}

void Mysql_select(struct Sql *mysql,char *query)
{
        mysql->select = mysql_real_query(&mysql->mysql,query,(unsigned int)strlen(query));

        int t = 0;
        if(mysql->select)
        {
                printf("select failed\n");
        }
        else
        {
                printf("select sucessful\n");

                mysql->res = mysql_store_result(&mysql->mysql);

                while(mysql->row = mysql_fetch_row(mysql->res))
                {
                	for(t = 0;t < mysql_num_fields(mysql->res);t++)
                        {
                                printf("%s\t",mysql->row[t]);
                        }
                        printf("\n");
                }
        }
}

void Mysql_add(struct Sql *mysql,const char * value)
{
        char template_h[128] = "insert into login(username,userpasswd,id) value (";
        const char * template_f = ")";
        strcat(template_h,value);
        strcat(template_h,template_f);

        mysql->flag = mysql_real_query(&mysql->mysql,template_h,(unsigned int)strlen(template_h));
        if(mysql->flag)
        {
                printf("add sucess!\n");
        }
        else
        {
                printf("add failure!\n");
        }
}

void Mysql_del(struct Sql *mysql,const char * value)
{
        char template_h[128] = "delete from login where username=";
        strcat(template_h,value);

        mysql->flag = mysql_real_query(&mysql->mysql,template_h,(unsigned int)strlen(template_h));
        if(mysql->flag)
        {
                printf("delete sucess!\n");
        }
        else
        {
                printf("delete failure!\n");
        }
}

void Mysql_update(struct Sql *mysql,const char * username,const char *passwd)
{
        char template_h[128] = "update login set userpasswd=";
        strcat(template_h,passwd);
        const char *template_f = "where username ="
        strcat(template_h,template_f);
        strcat(template_h,username);

        mysql->flag = mysql_real_query(&mysql->mysql,template_h,(unsigned int)strlen(template_h));
        if(mysql->flag)
        {
                printf("update success\n");
        }
        else
        {
                printf("update failure!\n");
        }
}


void Mysql_destroy(struct Sql *mysql)
{

        mysql_close(&mysql->mysql);
}


int main()
{
        static struct Sql mysql;

        char * value = "'root','passwd',0";
        char * id = "'111'";
        char * username = "'root'";
        char * passwd = "'123456'";
        Mysql_init(&mysql);
        Mysql_select(&mysql,"select * from login");
        Mysql_add(&mysql,value);
        Mysql_select(&mysql,"select * from login");
        Mysql_del(&mysql,id);
        Mysql_select(&mysql,"select * from login");
        Mysql_update(&mysql,username,passwd);
        Mysql_select(&mysql,"select * from login");
        Mysql_destroy(&mysql);


}

源碼

結果