--%>
Assignment Help - homework help

"Const" qualifier for pointers and member function

In C++ an arguments to a function can be declared as constant as shown below:

Int strlen (constant char * p);

Int length (constant string & s);

The qualifier const tells the compiler that the function should not modify the arguments. The compiler will produce error when this situation is violated. This type of declaration is significant only when we pass arguments by reference or pointer.

Constant member functions: If a member function does not alter any data in the class, than we have may declare it as a constant member function as follows:

Void mul (int. Int) constant;

Double get _ balance constant;

The qualifier constant is appended to the function proto types (in both declaration and definition). The compiler is as a constant will generate an error message if such functions try to alter the data values.

 

 

 

   Related Questions in Programming Languages

  • Q : What is Bit manipulation operator Bit

    Bit manipulation operator: Operators, like &, | and ^, which are employed to examine and manipulate individual bits win the bytes of a data item. The shift operators, <<, >> and >>>, are too bit manipulation operators.

    		•
  • Q : Macro definition in C and C++ Macro in

    Macro in C: Macros are defined as single identifier

    		•
  • Q : Computer science 1. Here is a short

    1. Here is a short program. It prints out the value of a variable "x". Ernie and Bert disagree about what will be printed: Ernie says, the value gets changed in "changeX" so it will print "7", and Bert says, no, when the function exits the changes get reversed and the value goes back to "5". Explain

    		•
  • Q : State the term non-XML resources State

    State the term non-XML resources?

    		•
  • Q : What is High level programming language

    High level programming language: Languages like Ada, Java, C++, and so on which give programmers with features like control structures, classes, methods, packages, and so forth. Such features are mostly independent of any specific instruction set, and

    		•
  • Q : What is Control structure Control

    Control structure: A statement which affects the flow of control in a method. The typical control structures are if statements and loops.

    		•
  • Q : Explain While loop While loop: It is

    While loop: It is one of Java's three control structures employed for looping. The other two are: do loop and for loop. The while loop comprises of a Boolean expression and a loop body. The condition is tested prior to the loop body is entered for the

    		•
  • Q : Define Hardware Hardware : It is the

    Hardware: It is the physical devices of a computer system, like its micro-chips, keyboard, disk drives, printer, sound card, and so forth. It is termed `hardware' in contrary to programs, which are termed `software'.

    		•
  • Q : Define Homology Modeling In Structural

    Homology Modelling is a process in which models are generated. The generated models may be conceptual or graphical or/and mathematical.So, we have different methods, tools and techniques for all kinds of modeling.Modelling methods are broadly classifi

    		•
  • Q : Use of System Dynamic and System Runtime

    What is the use of System.Dynamic and System.Runtime.CompilerServices namespaces?

    		•