Inttypes.h

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C++ Standard Library headers
C Standard Library headers
assert.h
complex.h
ctype.h
errno.h
fenv.h
float.h
inttypes.h
iso646.h
limits.h
locale.h
math.h
setjmp.h
signal.h
stdarg.h
stdbool.h
stddef.h
stdint.h
stdio.h
stdlib.h
string.h
tgmath.h
time.h
wchar.h
wctype.h

The inttypes.h file is a C header file that is part of the C standard library and API. It defines integral types whose sizes are specific and guaranteed. The behavior of the signed and unsigned modifiers upon these types is undefined; use like-size or widening casts within these types instead.

Integral types defined by inttypes.h

Specifier	Common Equivalent	Signing	Bits	Bytes	Minimum Value	Maximum Value
int8_t	char	Signed	8	1	−128	127
uint8_t	unsigned char	Unsigned	8	1	0	255
int16_t	short	Signed	16	2	−32,768	32,767
uint16_t	unsigned short	Unsigned	16	2	0	65,535
int32_t	long	Signed	32	4	−2,147,483,648	2,147,483,647
uint32_t	unsigned long	Unsigned	32	4	0	4,294,967,295
int64_t	long long	Signed	64	8	−9,223,372,036,854,775,808	9,223,372,036,854,775,807
uint64_t	unsigned long long	Unsigned	64	8	0	18,446,744,073,709,551,615

[edit] See also

• C syntax, the Typical boundaries of primitive integral types chart.
• stdint.h

[edit] Downloads

As inttypes.h is currently NOT shipped with Visual Studio C++ products, you may want to use some external one.

• inttypes.h - This inttypes.h may be used with Microsoft compilers only. Depends on stdint.h. Tested with Microsoft Visual Studio .NET 2003 and Microsoft Visual Studio .NET 2005.