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  2. C data types - Wikipedia

    en.wikipedia.org/wiki/C_data_types

    For every type T, except void and function types, there exist the types "array of N elements of type T". An array is a collection of values, all of the same type, stored contiguously in memory. An array of size N is indexed by integers from 0 up to and including N−1. Here is a brief example:

  3. Boolean data type - Wikipedia

    en.wikipedia.org/wiki/Boolean_data_type

    The bool type is a byte-sized type that can only hold the value true or false. The only operators that can accept operands of type bool are: &, |, ^, &=, |=, ^=, !, &&, || and ?:. A bool value can be implicitly converted to any integral type, with false becoming 0 and true becoming 1. The numeric literals 0 and 1 can be implicitly converted to ...

  4. C syntax - Wikipedia

    en.wikipedia.org/wiki/C_syntax

    A snippet of C code which prints "Hello, World!". The syntax of the C programming language is the set of rules governing writing of software in C. It is designed to allow for programs that are extremely terse, have a close relationship with the resulting object code, and yet provide relatively high-level data abstraction.

  5. C (programming language) - Wikipedia

    en.wikipedia.org/wiki/C_(programming_language)

    This is an accepted version of this page This is the latest accepted revision, reviewed on 17 January 2025. General-purpose programming language "C programming language" redirects here. For the book, see The C Programming Language. Not to be confused with C++ or C#. C Logotype used on the cover of the first edition of The C Programming Language Paradigm Multi-paradigm: imperative (procedural ...

  6. Bit field - Wikipedia

    en.wikipedia.org/wiki/Bit_field

    In this case, the programmer can declare a structure for a bit field which labels and determines the width of several subfields. [6] Adjacently declared bit fields of the same type can then be packed by the compiler into a reduced number of words, compared with the memory used if each 'field' were to be declared separately.

  7. Boolean expression - Wikipedia

    en.wikipedia.org/wiki/Boolean_expression

    In computer science, a Boolean expression is an expression used in programming languages that produces a Boolean value when evaluated. A Boolean value is either true or false.A Boolean expression may be composed of a combination of the Boolean constants True/False or Yes/No, Boolean-typed variables, Boolean-valued operators, and Boolean-valued functions.

  8. Type family - Wikipedia

    en.wikipedia.org/wiki/Type_family

    For example, [2] using Haskell's associated types notation, we can declare a type class of valid array element types, with an associated data family representing an array of that element type: class ArrayElem e where data Array e index :: Array e -> Int -> e

  9. Uninitialized variable - Wikipedia

    en.wikipedia.org/wiki/Uninitialized_variable

    This is because if the length of first_name and last_name character arrays are less than 16 bytes, during the strcpy, [1] we fail to fully initialize the entire 16 bytes of memory reserved for each of these members. Hence after memcpy()'ing the resulted struct to output, [2] we leak some stack memory to the caller.