Why does this result in an error

[dpr9966]

  void example (int x)
{
	x=x+1;
}

Why would the following result in an error?

cout<<example(7);

NOTE: assume the call is part of a program where everything else is correct. In other words, the error is confined to the code shown here.

[LendraDwi]

Your function return type is void that means it dont return anything