checking if int when using scanf. Help!

[xtrmi]

Hi, I'm writing a program that requires me to use scanf. Is there a way to check if the user entered a int? Any help would be appreciated.

I'd be happy to cause a loop for unexpected input because then I could stop the loop with a flush and the user would be asked again to input the proper data. My problem is that after the first time it wont loop for a float. It only loops the first time.

[whiteflags]

Check the return value.

RETURN VALUES
These functions return the number of input items assigned,
which can be fewer than provided for, or even zero, in the
event of a matching failure. Zero indicates that, while
there was input available, no conversions were assigned;
typically this is due to an invalid input character, such
as an alphabetic character for a `%d' conversion. The
value EOF is returned if an input failure occurs before
any conversion such as an end-of-file occurs. If an error
or end-of-file occurs after conversion has begun, the num-
ber of conversions which were successfully completed is
returned.

Next time you'll look up the help page on your own, using the internet, yes?

[xtrmi]

I'm just in my freshman year of ECE. even with your post I can't figure out how this is going to help me if someone inputs 34er%^&&*. Will this return value tell me it was a success because scanf read 34 or will it return something to indicate there was input it couldn't read? Thanks.

[Salem]

%d%c perhaps?

[vapanchamukhi]

there is a library function called isdigit(). you have to include string.h header file.