[Dev-C++] Function Syntax C++

[<Olu...@ao...>]

I  want to write a function that will validate my C++ prgram. I want the 
function to display a message if wrong value type is entered.  For example -

int number1; 
cout <<  " Enter your number. The number must be between 1 and 4: " ;
cin >> number1;

if the user enter, a char value instead of a int value, i want the function 
to display a message of violation of variable type.

Is it possible to write this type of function and what is the syntax.

thnaks
olu...@ao...