How to apply strings and the "||" operator

zorrozhou

Only this code does not see what is wrong

zorrozhou

It is estimated that ob.scr(sql, "shuju") is wrong, is it returned BOOL, so it is impossible to attach a value to a String

linhanerror

topsycholmu
Dude's eyes are really unusual, maybe ob.scr(sql, "shuju") is really it
^^^^^^^^^^^^^^^^^^^
It may also be a compiler problem, maybe original

sardis1985

You declare one
bool flag=true
string zxs=ob.scr(sql, "shuju");
        if (zxs=="Beijing" || zxs=="Shanghai" || zxs=="Tianjin City" || zxs=="Chongqing")
        {
            flag=true
        }
        else
        {
            flag=false;
        }
return flag;

linhanerror

Maybe
return Kazakhstan, who knows what the director defines as the return

renalex

Step through

34rere

Well, agree with lsls, see the error message is really string zxs=ob.scr(sql, "shuju"); there is a problem here
The returned estimate is of type bool

hyuk0321

There are two possibilities:
  
1. Whether the return value of the function of lz is bool type, otherwise, it must be wrong.
2. Whether the return value of ob.scr(sql, "shuju") is of type string, otherwise, an error will occur.

The if(...) conditional expression is no problem, because the priority of relational operators is higher than that of logical operators!

yiyunshixue

This kind of error is obviously an inadvertent error. Under debugging and tracking, you will know where the problem is!

kalian2000

There is no problem with the code posted..

The landlord can post the code to see..

Or you can debug it yourself to see where the exception is.