C18 (C Standard Revision) - HandWiki

Short description: C programming language standard, 2018 revision

C Language Revisions
K&R C • ANSI C • C99 • C11 • C18 • C2x

C18 (previously known as C17) is the informal name for ISO/IEC 9899:2018,[1] the most recent standard for the C programming language, published in June 2018. It replaced C11 (standard ISO/IEC 9899:2011).[2]

C18 will be superseded by C2x.[3]

Contents

• 1 Changes from C11
• 2 Compiler support
• 3 See also
• 4 References
• 5 External links

Changes from C11

C18 addressed defects in C11 without introducing new language features.[2]

The __STDC_VERSION__ macro is increased to the value 201710L.

Compiler support

List of compilers supporting C18:

• GCC 8.1.0[4]
• LLVM Clang 7.0.0[5]
• IAR EWARM v8.40.1[6]

See also

• ANSI C, C90, C99, C11 – previous standards for the C programming language
• C++98, C++03, C++11, C++14, C++17, C++20 – versions of the C++ programming language standard
• Compatibility of C and C++

References

1. ↑ "ISO/IEC 9899:2018 - Information technology -- Programming languages -- C". https://www.iso.org/standard/74528.html. 
2. ↑ 2.0 2.1 "The Standard - C". http://www.iso-9899.info/wiki/The_Standard. 
3. ↑ "WG 14 Document log". http://www.open-std.org/jtc1/sc22/wg14/www/wg14_document_log.htm. 
4. ↑ "Using the GNU Compiler Collection (GCC): C Dialect Options". https://gcc.gnu.org/onlinedocs/gcc-8.1.0/gcc/C-Dialect-Options.html#index-std-1. 
5. ↑ http://releases.llvm.org/7.0.0/tools/clang/docs/UsersManual.html#differences-between-various-standard-modes
6. ↑ "IAR Information Center for Arm - Release notes". https://netstorage.iar.com/SuppDB/Public/UPDINFO/013857/arm/doc/infocenter/readme.ENU.html. 

External links

• N2176, archived final draft of the standard
• N2244, defect report summary for C11
• Gustedt, Jens (April 17, 2018). "C17". https://gustedt.wordpress.com/2018/04/17/c17/,  changes from C11

Preceded byC11

C language standards

Succeeded byC2x

v t e C programming language
ANSI C C89 and C90 C99 C11 C18 C2x Embedded C MISRA C
Features	Functions Header files Libraries Operators String Syntax Preprocessor Data types
Standard libraryfunctions	Char (ctype.h) File I/O (stdio.h) Math (math.h) Dynamic memory (stdlib.h) String (string.h) Time (time.h) Variadic (stdarg.h) POSIX
Standardlibraries	Bionic libhybris dietlibc EGLIBC glibc klibc Microsoft Run-time Library musl Newlib uClibc BSD libc
Compilers	Comparison of compilers ACK Borland Turbo C Clang GCC ICC LCC PCC SDCC TCC Microsoft Visual Studio / Express / C++ Watcom C/C++
IDEs	Comparison of IDEs Anjuta Code CodeLite Eclipse Geany Microsoft Visual Studio NetBeans
Comparison withother languages	Compatibility of C and C++ Comparison with Embedded C Comparison with Pascal Comparison of programming languages
Descendantlanguages	C++ C# D Objective-C Alef Limbo Go Vala
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