Simple C Program... Help

[Tiestarian]

Edit - Ignore this.. its working now





Hey.. trying to make a program that gets the user to enter a single "character" and then check what it is and print out these messages...

1. "? is an upper case letter" if the character is between 'A' and 'Z'
2. "? is a lower case letter" if the character is between 'a' and 'z'
3. "? is not a letter" otherwise

i've done the first two.. but can't manage number three.. it won't recognise non alphanumeric characters like "~" or ";" etc..

here's my code so far

#include #include "c:\cygwin\csci1401.h" main() { char sinChar; int isLower, isUpper; printf("Enter a single character"); sinChar = getChar(); int isLower = sinChar >= 'a' && sinChar <= 'z'; int isUpper = sinChar >= 'A' && sinChar <= 'Z'; if ( isUpper ) { printf("%c is an upper case letter\n", sinChar); } if ( isLower ) { printf("%c is an lower case letter\n", sinChar); } if ( !isLower && !isUpper ) { printf("%c is not a letter\n", sinChar); } }

but the last bit (in bold) won't work

Thanks in advance.
Ben