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  2. C data types - Wikipedia

    en.wikipedia.org/wiki/C_data_types

    The maximum size of size_t is provided via SIZE_MAX, a macro constant which is defined in the <stdint.h> header (cstdint header in C++). size_t is guaranteed to be at least 16 bits wide. Additionally, POSIX includes ssize_t, which is a signed integer type of the same width as size_t.

  3. Boolean data type - Wikipedia

    en.wikipedia.org/wiki/Boolean_data_type

    In computer science, the Boolean (sometimes shortened to Bool) is a data type that has one of two possible values (usually denoted true and false) which is intended to represent the two truth values of logic and Boolean algebra. It is named after George Boole, who first defined an algebraic system of logic in the mid 19th century.

  4. C syntax - Wikipedia

    en.wikipedia.org/wiki/C_syntax

    bool: 1 char: 8 signed char: 8 unsigned char ... and Visual C++, '1234' yields 0x31323334 under ASCII. [5 ... The size of a structure is equal to the sum of the sizes ...

  5. Operators in C and C++ - Wikipedia

    en.wikipedia.org/wiki/Operators_in_C_and_C++

    Moreover, in C++ (and later versions of C) equality operations, with the exception of the three-way comparison operator, yield bool type values which are conceptually a single bit (1 or 0) and as such do not properly belong in "bitwise" operations.

  6. Primitive data type - Wikipedia

    en.wikipedia.org/wiki/Primitive_data_type

    The newer C99 added a distinct Boolean type _Bool (the more intuitive name bool as well as the macros true and false can be included with stdbool.h), [10] and C++ supports bool as a built-in type and true and false as reserved words.

  7. Bit field - Wikipedia

    en.wikipedia.org/wiki/Bit_field

    [1] [2] A bit field is most commonly used to represent integral types of known, fixed bit-width, such as single-bit Booleans. The meaning of the individual bits within the field is determined by the programmer; for example, the first bit in a bit field (located at the field's base address ) is sometimes used to determine the state of a ...

  8. Magic number (programming) - Wikipedia

    en.wikipedia.org/wiki/Magic_number_(programming)

    The constants 1 and 0 are sometimes used to represent the Boolean values true and false in programming languages without a Boolean type, such as older versions of C. Most modern programming languages provide a boolean or bool primitive type and so the use of 0 and 1 is ill-advised. This can be more confusing since 0 sometimes means programmatic ...

  9. Trailing return type - Wikipedia

    en.wikipedia.org/wiki/Trailing_return_type

    In the C++ programming language, a function must be declared. The C++ function's return type is specified as a part of declaring that function. [1] A trailing return type, a syntax feature available since C++11, is like a traditional return type, except that it is specified in a different location. [2] [3] [4]