C while loop - code won't work

Question

I\'ve been writing a simple program to check if input letter is a vowel, and my code doesn\'t work. The program should take characters as input one by one until % is entered, wh

Answer 1

Presumably you're entering a character and then hitting [ENTER]. So, in actuality you are entering two characters -- the letter you typed and a line feed (\n). The second time through the loop you get the line feed and find that it's not a letter, so you hit the error case. Perhaps you want to add something like:

if (processed == '\n') {
    continue;
}