LinuxQuestions.org - scanf question

- Programming (https://www.linuxquestions.org/questions/programming-9/)

- - scanf question (https://www.linuxquestions.org/questions/programming-9/scanf-question-274984/)

How would you go about to discard or overlook a section of a string, when using scanf?

I'm trying to scan a http headerline. I need to read the status code

e-g-

Code:

int status;

status atoi(scanf(hdrstr, "HTTP/1.%* %s));

will %* discard whatever the char is?

Re: scanf question

Quote:

Originally posted by jnusa
How would you go about to discard or overlook a section of a string, when using scanf?

I'm trying to scan a http headerline. I need to read the status code

e-g-

Code:

int status; status atoi(scanf(hdrstr, "HTTP/1.%* %s));

will %* discard whatever the char is?

First off, you have an unterminated string constant. You want to put a close quote mark in there somewhere.

%* must be followed with a format string. For example, %*c will discard a character (like %c will read a character).

Also, scanf() returns the number of matches, not the string that was matched. To trap that, you will need to assign it to a value. scanf() can parse integers, so you might as well do that all in one go:

Code:

int status;

scanf(hdrstr, "HTTP/1.%d", &status);

Thanks for the reply.

That should be:

Code:

sscanf(hdrstr, "HTTP/1.%*c %d", &status);