Function
Prototyping
Function prototyping is
telling the compiler the name of the function, return data type including void,
number of parameter it receives and data type of the parameter and the order in
which it is supplied. The compiler uses this information at runtime to check
the correct type of parameter is supplied in right orders.
There can be function that may
not return any value. Also there can be function, which do not collect any
parameters. Consider the following function prototype:
float
MutiplyDivide(int, int,
int);
It tells the compiler that
function MultiplyDivide takes three integers as parameters and
returns a float. When you implement a function you actually specify the
parameter names like shown below:
float
MutiplyDivide(int param1, int param2, int
param3)
{
float
k;
//Some
Loagic Here
return
k;
}
You should also note that the compiler will not restrict
you to name parameters in the function prototype. The below prototype is
absolutely acceptable:
float
MutiplyDivide(int m1, int
m2, int d1);