Is there a good example of how toupper() works?

[Matthew E Cross]

In article <wb76pN600awOE3SaQz at andrew.cmu.edu> jh4o+ at andrew.cmu.edu (Jeffrey T. Hutzelman) writes:
>Try this one:
>
>void strupper(char *str)
>{
>for (;*str!='\0';str++)
>	*str=toupper(*str);
>}

Nope, won't work - the return value of 'toupper' is undefined if the input is
not a lowercase character.  Try:

void strupper(char *str)
{
for (;*str!='\0';str++)
       *str=islower(*str)?toupper(*str):*str;
}

(I hope I got the '? :' syntax right...)
-- 
+----------------------------------------------------+------------------------+
| "The letter U has a lot of uses ... | Looking for  |  profesor at wpi.wpi.edu  |
|  I like to play it like a guitar!"  | suggestions  +------------------------+
|          -Sesame Street             | for new gweepco programs...           |