Cannot Convert QString to const Char *

Asked May 22 '15 at 04:43

Active May 22 '15 at 04:54

Viewed 346 times

I need to convert QString to const char* then have to pass to another function

My code looks,

QString port = "1234";
const char *Port = port.toLatin1().data();
setport(Port); //function call

Function

void setport(const char *Port){
  int p = atoi(Port); // here I am getting 0 instead 1234
}

I am using Qt5.4.1

Any help will be appreciated.

Thanks Haris

edited May 22 '15 at 04:54

asked May 22 '15 at 04:43

Haris

1

I found the answer already there and using the code as shown in my Question, Only difference is the atoi() function. – Haris May 22 '15 at 05:00
2

Try QString port = "1234"; QByteArray ba = port.toLatin1(); const char *Port = ba.data(); – kylecorver May 22 '15 at 05:09
Hi thanks it works, but why my method wont work which doing the same in single step. – Haris May 22 '15 at 05:24
I have tried it myself ... but I have no idea, why it is not working ^^ sry – kylecorver May 22 '15 at 05:29
Anyway the issue solved, thanks once again. – Haris May 22 '15 at 05:32
You don't say what error you see / behaviour you see. – Hamish Moffatt May 22 '15 at 05:35
1

@Haris There is a good explanation why you need to store QByteArray here: http://stackoverflow.com/questions/5505221/converting-qstring-to-char – demonplus May 22 '15 at 05:36
@HamishMoffatt I am getting 0 while using atoi(), I explained that as a comment in above code. – Haris May 22 '15 at 08:26

0 Answers0