Month: August 2013

Parameterized Constructor: We know that when we create an object the constructor function gets execution automatically. Consider the following lines of codes, constructor(){ //this is the constructor function a=1; //initializing }void main(){ constructor ob1,ob2; } When this executed the value of ‘a’ for both ob1 and ob2 sets to 1. But when we want different … Read more

Namespace: Namespace defines a scope for the identifiers that are used in the program. To use we will do the following      using namespace namespace_name; here, at namespace_name we will give the name of the namespace we want to use. Supposing that we are writing the following,      using namespace std; here, std is the … Read more

The this Pointer: When a function of a class is called by an object of that class, each variable gets an pointer which points to that calling object, meaning that this variable was called by that object or this variable is under that object. This pointer is called this pointer. To clarify consider the following … Read more

Function Overloading: Overloading refers to the use of the same thing for different purposes. When the same name for different functions is used that is called function overloading. The functions are then distinguished by their parameters or argument lists. Functions can be overloaded by changing, increasing or decreasing their arguments, float add(float a, float b)int … Read more

Constructor:A constructor is a ‘special’ function whose task is to initialize the objects of its class. It is special because its name is the same as the class name. A constructor is executed whenever object of its class is created. It is called constructor because it constructs the values of data members of the class. … Read more

Properties of Constructor Function: Following are some properties of Constructor Function They will have the same name as of their class. They should be declared in the public section. They are executed automatically when objects are created. They do not have return types, not even void and thus they can’t return values. They can’t be … Read more

Static Data Member and Difference with Non-static Data Member: In general when we declare some objects of a class, each object is allocated with memory space for each variable of the class separately under them as given below, But in the case of static data member only one memory location will be allocated and that … Read more

Properties of Static Member Function: Following are some properties of Static Member Function A static member function can only have access to other static data members and functions declared in the same class. A static member function can be called using the class name with a scope resolution operator instead of object name. Global functions and … Read more

Inline Function:Every time a function is called, it takes a lot of extra time in executing a series of instructions for tasks such as jumping to that function, saving registers, pushing arguments into the stack and returning to the calling function. Also when a function is small a large percentage of execution time may be … Read more

Friend Function: Friend functions are those functions which can access all the functions and  variables of a class though it is not a member function of that class. Actually to share a function among two or more classes friend functions are used. If it is declared so, then it will able to access all variables … Read more