convert string to capital letters without toupper()

[sleet]

Hi, I was wondering if anyone can help me. I need to convert a string to capital letters without using toupper(). I was wondering if anyone can give me a hint on what to use or need to do? All my searches have only ever lead me to using the toupper(). Please help. Thanks in advanced.

[Jikax]

Use the decdecimal values of ascii charters (see www.asciitable.com)

char c = 'g' ;
cout << c;
c -= ( 'a' - 'A');
cout << c;

gG

[sleet]

Wow!! thanks!!! that helped me a lot! but I just have a question, what does this part mean?

c -= ( 'a' - 'A');

Thank you again, Jikax!

[Jikax]

Char 'a' equals int 97.
Char 'A' equals int 65.
Char 'g' equals int 103.

103 - ( 97 - 65 ) = 71

Int 71 equals char 'G'

You also could have used 'z'-'Z' .. Of just 32... It gives The same result...

[sleet]

oh ok... I understand it better now.. i didn't know it was possible to subtract the char value.. thanks so much again! :)