C++ in a Nutshell
| unsigned specifier | Unsigned integer type specifier |
| simple-type-specifier := unsigned |
The unsigned type specifier can be used with any integral type to make the type unsigned. Unsigned integer arithmetic is always performed modulo 2 n , in which n is the number of bits in the value representation of the integer. When used alone, unsigned means unsigned int .
Example
char c; if (isalpha(static_cast< unsigned char >(c)) handle_alpha(c);
See Also
char , int , long , short , signed , type , Chapter 2