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New language features of C99
New library features of C99
// comments in C99 and C90
Compound literals in C99
Designated initializers in C99
Hexadecimal floating-point numbers in C99
Flexible array members in C99
__func__ predefined identifier in C99
inline functions in C99
long long data type in C99 and C90
Macros with a variable number of arguments in C99
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New block scopes for selection and iteration state
_Pragma preprocessing operator in C99
Restricted pointers in C99
Additional <math.h> library functions in C99
Complex numbers in C99
Boolean type and <stdbool.h> in C99
Extended integer types and functions in <inttyp
<fenv.h> floating-point environment access i
<stdio.h> snprintf family of functions in C9
<tgmath.h> type-generic math macros in C99
<wchar.h> wide character I/O functions in C9
How to prevent uninitialized data from being initi
Compiler Diagnostic Messages
Using the Inline and Embedded Assemblers of the AR
New library features of C99
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| Home > Compiler Coding Practices > New library features of C99 | |||
The C99 standard introduces several new library features of interest to programmers, including:
Some features similar to extensions to the C90 standard libraries offered in UNIX standard libraries, for example, the
snprintffamily of functions.Some entirely new library features, for example, the standardized floating-point environment offered in
<fenv.h>.New libraries, and new macros and functions for existing C90 libraries.
A selection of new features in C99 that might be of interest to developers using them for the first time are documented.
Note
C90 is compatible with Standard C++ in the sense that the language specified by the standard is a subset of C++, except for a few special cases. New features in the C99 standard mean that C99 is no longer compatible with C++ in this sense.
Many library features that are new to C99 are available in
C90 and C++. Some require macros such as USE_C99_ALL or USE_C99_MATH to
be defined before the #include.
See also| Copyright © 2007-2008, 2011-2012 ARM. All rights reserved. | ARM DUI 0375D |
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