Section 2: Compiler
55
TI
-
89 / TI
-
92 Plus Sierra C Assembler Reference Manual
Not for Distribution
Beta Version February 2, 2001
An integer constant can be represented in three different bases: octal, decimal,
and hexadecimal. A constant’s base is determined by its leading character(s).
Octal constants begin with a zero, and hexadecimal constants begin with the
character pair 0x or 0X. Decimal constants begin with any nonzero digit.
Examples of integer constants include:
15092 0xf9a 0XF9al
03510 275uL 319LU
The type of an integer constant is determined by its value, base, and suffix (if
any) according to the following rules:
1. The type of a decimal constant with no suffix is the first type in the following
list in which its value can be represented:
int
,
long int
,
unsigned long int
.
2. The type of an octal or hexadecimal constant with no suffix is the first type in
the following list in which its value can be represented:
int
,
unsigned int
,
long int
,
unsigned long int
.
3. The type of a constant with only the
u
(or
U
) suffix is the first type in the
following list in which its value can be represented:
unsigned int
,
unsigned
long int
.
4. The type of a constant with only the
l
(or
L
) suffix is the first type in the
following list in which its value can be represented:
long int
,
unsigned
long
int
.
5. The type of a constant with both the
u
(or
U
) suffix and the
l
(or
L
) suffix is
unsigned long int
.
For example, the constant 0x81234567 is recognized as an
unsigned long int
,
because it cannot be represented as a 32-bit
signed
long int
.
2.7.3. Enumeration Constants
An identifier declared as an enumeration constant has type
int
. An enumeration
constant can be used anywhere an integer constant is allowed; however, there
are some restrictions when an enumeration constant is assigned to an
enumeration variable. See section
2.9.5 Enumeration Types
, for additional
information.
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