Passing Parameters of a function in C/C++

Parameters passing to function

Parameter passing to a function is a process of passing values from function call to the function header.

Example:

#include<conio.h>

#include<iostream.h>

void square_of_value(int); à function declaration

void main()

{

clrsrc();

int value = 0;

cout<< “ Enter a value: “ ;

cin>> value;                                                                   

square_of_value( value );  à function call

getch();                                                                               

}

void square_of_value(int num) à function header

{

cout << “square of the given number is: ”<< num ;

}

Actual parameter

Actual parameter is a parameter that is used in function call. It is passed to the function.

Formal parameter

A parameter used in function header is called as Formal parameter.