notANumber in C? how?

[delta770]

i've done VB programming, and java, but i'm new to C, and i was wondering how i would be able to read a valid input.

if the user inputs an invalid number, how do i check for that? java there is a command called notANumber returns a boolean, (or something very similar)...is there an equivalent in c?


also is there a way to check if the int entered is too large? i'm trying to do something using "sizeof()", but not sure what i can do with it...
any other functions or expressions i could use?



i'm trying to stay away from trying and catching exceptions...
thanx in advance

--770