C17 (C standard revision)

C programming language standard, 2017 revision From Wikipedia, the free encyclopedia

C17, formally ISO/IEC 9899:2018,[1] is an open standard for the C programming language, prepared in 2017 and published on 2018-07-05.[1] It replaced C11 (standard ISO/IEC 9899:2011),[2] and is superseded by C23 (ISO/IEC 9899:2024) since October 2024.[3] Since it was under development in 2017, and officially published in 2018, C17 is sometimes referred to as C18.[4]

Changes from C11

C17 fixes numerous minor defects in C11 without introducing new language features.[2]

The __STDC_VERSION__ macro is increased to the value 201710L.

For a detailed list of changes from the previous standard, see Clarification Request Summary for C11.[5]

Compiler support

List of compilers supporting C17:

See also

References

Further reading

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