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    C reference

    From cppreference.com
     
    C
     

    C89, C95, C99, C11, C17, C23  │  Compiler support C99, C23

    Language

    Basic concepts
    Keywords
    Preprocessor
    Expressions
    Declaration
    Initialization
    Functions
    Statements

    Headers

    Type support

    Program utilities

    Variadic functions

    Diagnostics library

    Dynamic memory management

    Strings library

    Null-terminated strings:
       byte  −   multibyte  −   wide

    Date and time library

    Localization library

    Input/output library

    Algorithms library

    Numerics library

    Common mathematical functions
    Floating-point environment (C99)
    Pseudo-random number generation
    Complex number arithmetic (C99)
    Type-generic math (C99)
    Bit manipulation (C23)
    Checked integer arithmetic (C23)

    Concurrency support library (C11)

    Technical specifications

       Dynamic memory extensions  (dynamic memory TR)
       Floating-point extensions, Part 1  (FP Ext 1 TS)
       Floating-point extensions, Part 4  (FP Ext 4 TS)

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