--%>
Assignment Help - homework help

Define Unions

Unions: Unions in C and C++ are object overlays—aggregate quantities such as structs, except that each element of the union consists offset 0, and the total size of union is only as large as is required to hold its largest member (Kernighan and Ritchie 1998).

2120_unions.jpg

Unions are not supported by languages like Java. The translation has to generate different objects for the union itself and all its fields, plus the code to keep their values consistent. This results in additional overhead and can increase the state space considerably.

   Related Questions in Programming Languages

  • Q : Function prototypes Function prototypes

    Function prototypes: Function declaration which specifies the function name, return type and parameter list of the function. Syntax: return_type function_name(type var1, type var2,…

    		•
  • Q : Explain Downcast with example Explain

    Explain Downcast with example: It is a cast towards an object's dynamic kind - that is, `down' the inheritance hierarchy. For illustration:        // Downcast from Object to String

    		•
  • Q : Define Fetch-execute cycle

    Fetch-execute cycle: The simple set of steps which are endlessly recurring by a computer's Central Processing Unit for each and every program instruction: `Fetch the next instruction suggested by the program counter,' `update the program counter to pa

    		•
  • Q : Explain the applications of testing

    Explain the applications of testing life cycle.

    		•
  • Q : Default function arguments C++ allows

    C++ allows us to call

    		•
  • Q : Choice of technology in coding of game

    What are the choice of technologies while coding a game?

    		•
  • Q : What do you mean by Class variable What

    What do you mean by Class variable: It is a synonym for the static variable.

    		•
  • Q : Define Sign bit Sign bit : In

    Sign bit: In 2s-complement notation, the most important bit in an integer value is employed to determine the sign of the value. A 1-bit point out a negative number and a 0 bit point out a positive number.

    		•
  • Q : Define the term Garbage collector

    Garbage collector: It is a daemon thread which recycles objects to which there are no extant references in a program.

    		•
  • Q : What is Character set encoding

    Character set encoding: The set of values allocated to characters in a character set. Associated characters are frequently grouped with consecutive values, like the digits and alphabetic characters.

    		•