Programming in C++, 2nd Edition

Passing Arguments 209

cout<<“\n In show()”;

}

OUTPUT

In show()

Explanation: In the above program, the prototype of function show() is given preceding void

keyword. The statement show() invokes the show() function that displays the message “In

show()”.

7.3 PASSING ARGUMENTS

The main objective of passing argument to function is message passing. The message passing

is also known as communication between two functions, that is between caller and called func-

tions. There are three methods by which we can pass values to the function. These methods are

as follows:

(a) Call by value (pass by value)

(b) Call by address (pass by address)

(c) Call by reference ...