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  • C/C++操作MySQL数据库——增、删、改、查

    1、数据库链接

    int cppDatebase::DatabaseConnect(sBit8 *uName,sBit8 *pWord,sBit8 *dbName)

    {

      dbHandle = mysql_init(NULL);
      if(NULL == dbHandle )
      {
        cout<<"mysql init error!"<<endl;
        return (-1);
      }  

      if(NULL == mysql_real_connect(dbHandle ,"localhost",uName,pWord,dbName,0,NULL,0))

      {
        cout<<"connect error!"<<endl;
        return (-1);
      }

      mysql_set_character_set(dbHandle ,"utf8");

      return 0;

    }

    2、数据库插入——增

    int cppDatebase::DatabaseInsert(const char *cmd)
    {
      if(NULL == cmd)
      {
        cout<<"[insert] cmd error"<<endl;
        return (-1);
      }

      int ret = mysql_query(dbHandle,cmd);
      if(ret !=0)
      {
        cout << "Database Insert Info: exist, I am updata." <<endl<<endl;
        return (-1);
      }

      return 0;
    }

    3、数据库删除——删

    int cppDatebase::DatabaseDelete(const char *cmd)
    {
      if(NULL == cmd)
      {
        cout<<"[delete] cmd error"<<endl;
        return (-1);
      }

      int ret = mysql_query(dbHandle,cmd);
      if(ret !=0)
      {
        cout << "Database Delete Info: not exist." <<endl<<endl;
        return (-1);
      }

      return 0;
    }

    4、数据库更新——改

    int cppDatebase::DatabaseUpdate(const char *cmd)
    {
      if(NULL == cmd)
      {
        cout<<"[update] cmd error"<<endl;
        return (-1);
      }

      int ret = mysql_query(dbHandle,cmd);
      if(ret !=0)
      {
        cout << "Database Update Info: not exist, I am insert." <<endl<<endl;
        return (-1);
      }

      return 0;
    }

    5、数据库查询——查

    int cppDatebase::DatabaseQuery(char *cmd, char **row)
    {
      if(NULL == cmd || NULL == row)
      {
        cout<<"[query] cmd error"<<endl;
        return (-1);
      }

      mysql_real_query(dbHandle,cmd,strlen(cmd));

      MYSQL_RES *result = mysql_store_result(dbHandle);
      if(result != NULL)
      {
        int numLine = mysql_num_rows(result);
        int numList = mysql_num_fields(result);
      }
      else
      {
        cout<<"[query] mysql_store_result error !"<<endl;
        return (-1);
      }
      while((row = mysql_fetch_row(result)))
      {
        printf("%s, %s %s %s ",row[0],row[1],row[2],row[3]);
      }
      mysql_free_result(result);

      return 0;
    }

    6、数据库断开

    int cppDatebase::DatabaseClose()
    {
      mysql_close(dbHandle);

      return 0;
    }

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  • 原文地址:https://www.cnblogs.com/xiehy/p/3812003.html
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