[求助] C++调用mysql，想完成一个如下的查询，却查询失败。急求解决方法

2?: Originally posted by chw521 at 2012-05-30 15:35:04
"select * from id_table where id=paper_id“ 改为 "select * from id_table where id=" + paper_id

4楼: Originally posted by bobobobo_8888 at 2012-05-30 16:44:14
int paper_id;
string paper_id;
                  cout<<"请输入ID"<<endl;
                  cin>>paper_id;
                  res=mysql_query(&myCont,"select *  ...

7楼: Originally posted by onluy at 2012-05-30 23:02:14
首先你要看下在表id_table中属性列id的数据类型。
如果是字符串。
res=mysql_query(&myCont,"select * from id_table where id=‘" + paper_id+“’”);
也就是这个查询语句应该是3个字符串构成的 ...

9楼: Originally posted by nlyang at 2012-05-31 13:02:01
int的话，就必须把int转成字符串，大概思路如下：
char * sql=new char;
memset(sql,'\0',100);
sprintf(sql,"select * from id_table where id=%d;",paper_id);
再执行sql，

如果还是不对，你就直 ...