Beginner question

Hey /prog/. I have wrote a program in C that asks for the user to enter a string. How would I go about validating the input and making sure only alphabetic characters or spaces are accpeted as valid input?

Looking at the characters and seeing if they're alphabetic or whitespace.

Try looking at each character to see if they're alphabetic or spaces.

But how would I go about doing that?  I tried to sort through the string with a for loop but I couldn't get it to work.

Create an iterator that yields each character in succession, then map that with a function that checks whether a character is alphanumeric or not. Ensure that the results are all positive.

Alternatively, just use a fucking for loop to check each character. This takes literally two lines of code no matter how verbose you write it, and is probably better fit to C.

Use the isalpha and isspace standard library functions in the ctype.h header file.

>>6
Terrible!