USER- DEFINED FUNCTIONS

Question 1

What are functions

Answer 1

Subroutine which may be called from within other
functions

Question 2

Function format

Answer 2

return type name (argument declarations list) {
function body
}

Question 3

‘return’ value function

Answer 3

To obtain a value from a function use the function return

no return type or arguments use type void

Question 4

Input arguments/parameters

Answer 4

Used to convey values
from the calling program to the function

Question 5

function body

Answer 5

Variables other than arguments are declared within the body,
which is bounded by braces.

Question 6

Argument declaration

Answer 6

The argument declaration list is a comma separated list of
variable declarations.

Question 7

How to call function

Answer 7

Stating its name followed by the function call operator, which may enclose any possible parameters which need to be passed to the function.

Question 8

Example of function layout

Answer 8

int diff (int x, int y)

/* function name and
argument list */

{
int z;
//declare local
variables

z = x – y;
return z;
}