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short, long, signed, unsigned | Keywords |
Keyword Index |
Type modifiers.
A type modifier alters the meaning of the base type to yield a new type.
Each of these type modifiers can be applied to the base type int.
The modifiers signed
and unsigned
can be applied to the base type char.
In addition, long
can be applied to double.
When the base type is omitted from a declaration, int
is assumed.
For example,
long x; // 'int' is implied unsigned char ch; signed int i; // 'signed' is default unsigned long int l; // 'int' is accepted, but not neededIn this implementation of the compiler, the valid range of valid data types is as listed in the following table:
short int -32768 to 32767 long int -2147483648 to 2147483647 signed char -128 to 127 signed int -32768 to 32767 (signed is default) [or -2147483648 to 2147483647 if '-mnoshort' is given] signed short int -32768 to 32767 signed long int -2147483648 to 2147483647 unsigned char 0 to 255 unsigned int 0 to 65535 [or 0 to 4294967295 if '-mnoshort' is given] unsigned short int 0 to 65535 unsigned long int 0 to 4294967295Note: GNU C extends the
long
keyword to allow
double-long integers (64-bit integers in this implementation),
so they have range from -9223372036854775808 to 9223372036854775807 if signed, or from 0 to
18446744073709551615 if unsigned.