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C11 mainly standardizes features already supported by common contemporary compilers, and includes a detailed memory model to better support multiple threads of execution. Due to delayed availability of conforming C99 implementations, C11 makes certain features optional, to make it easier to comply with the core language standard.
This new feature didn't need any C++ language core extensions (though implementations will take advantage of various C++11 language features), only a small extension of the header <functional> and the introduction of headers <unordered_set> and <unordered_map>. No other changes to any existing standard classes were needed, and it doesn't depend ...
In addition to C++11 attributes listed below, add new attributes: [[unsequenced]] [ 45 ] allows compiler optimizations for functions producing repeatable outputs only based on their parameters [[reproducible]] , [ 45 ] similar to [[unsequenced]] , but for functions whose call order also matters
GCC, Solaris Studio, and other C compilers now [when?] support many or all of the new features of C99. The C compiler in Microsoft Visual C++, however, implements the C89 standard and those parts of C99 that are required for compatibility with C++11. [25] [needs update]
Cover of the C99 standards document. C99 (previously C9X, formally ISO/IEC 9899:1999) is a past version of the C programming language open standard. [1] It extends the previous version with new features for the language and the standard library, and helps implementations make better use of available computer hardware, such as IEEE 754-1985 floating-point arithmetic, and compiler technology. [2]
C17, formally ISO/IEC 9899:2018, [1] is an open standard for the C programming language, prepared in 2017 and published in July 2018. It replaced C11 (standard ISO/IEC 9899:2011), [2] and is superseded by C23 (ISO/IEC 9899:2024) since October 2024. [3]
11 C++ compilers. 12 C# compilers. 13 COBOL compilers. ... They are used mostly for fast prototyping new language features and new optimizations in research areas.
In C23 generic selection is used to make C's behaviour more similar to C++'s. [11] C++ is also more strict in conversions to enums: ints cannot be implicitly converted to enums as in C. Also, enumeration constants (enum enumerators) are always of type int in C, whereas they are distinct types in C++ and may have a size different from that of int.