--%>

"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 : Explain Method overriding Method

    Method overriding: It is a method stated in a super class might be overridden by a method of similar name stated in a sub class. The two methods should have similar name and number and types of formal arguments. Any checked exception thrown by sub-cla

  • Q : Who is liable for XML Who is liable for

    Who is liable for XML?

  • Q : How can Login dialog accessed The web

    The web page I am testing displays the Login dialog. How can I access this dialog?

  • Q : Problem on linear equations using Matlab

    Use Matlab to solve the following system of linear equations:2x + y + 3z = 12x + 6y + 8z = 36x + 8y + 18z = 5Capture Matlab code and the result in a text file.

  • Q : Are you sure that XHTML element name

    Are you sure that XHTML element name case sensitive? Answer: XHTML element names surely are case sensitive. Every element names should be written within lower case l

  • Q : Security features in the UNIX State the

    State the various security features within the UNIX?

  • Q : Identify Customers in SQL The company

    The company wish to provide an incentive of free shipping to such customers who have not returned for 2 months. Build a procedure named PROMO_SHIP_SP which determines these customers are and then updates the BB_PROMOLIST table accordingly. The procedure employs the be

  • Q : Search and Coverage of SPIN Search and

    Search and Coverage of SPIN: SPIN has a highly optimized state exploration algorithm. It supports random, interactive and guided simulation, and both exhaustive and partial coverage, based on either depth-first or breadth-first search.

    Q : Describe Throw an exception Throw an

    Throw an exception: Whenever an exceptional circumstance occurs in a program - frequently as an outcome of a logical error and exception object is formed and thrown. When the exception is not caught by an exception handler, the program will finish wit

  • Q : What is an Object construction Object

    Object construction: The creation of an object, generally through the new operator. Whenever an object is formed, a suitable constructor from its class is summoned.