Describe syntax and use of defining member function outside class. Give one example.

Describe syntax and use of defining member function outside class. Give one example.
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1 Answer

Answer :

Member function that is declared inside a class has to be defined separately outside the class. These member functions associate a membership identify label in the header. This label tells the compiler which class the function belongs to.

Syntax of a member function definition is.

Return type class name:: function-name(argument declaration)

{

Function body

}

The membership label class-name:: tells the compiler that the function function-name belongs to the class-name. The symbol :: is called as scope resolution operator.

Ex- the function getdata is coded as

void item:: getdata(int a, float b)

{

number = a;

cost = b;

}

The member function have some special characteristics :- i) Several different classes can use the same function name the membership label will resolve their scope. ii) Member function can access the private data of the class. A non member function cannot do so. iii) A member function can call another member function directly, without using the dot operator. 
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