C++ Function Parameter Declarations

#include <iostream>
using namespace std;
void findMax(int, int);  // function declaration (prototype)
int main()//from   ww w .ja v a  2  s.c  o  m
{
   int firstnum, secnum;
   cout << "\nEnter a number: ";
   cin  >> firstnum;
   cout << "Great! Please enter a second number: ";
   cin  >> secnum;
   findMax(firstnum, secnum);  // function is called here
   return 0;
}