// Inputs numbers and tells if odd or even 
#include <iostream>
using namespace std;
int even(int);   // the prototype for function even 
int main()
{ int num;
  cout<<"Enter a number:";
  cin>>num;
  if (even(num))  // call function even passing num 
    cout<<num<<" is even.\n";
  else
    cout<<num<<" is odd.\n";
  return 0;
} // main 

int even(int n)
// returns 1 if n is divisible by 2, 0 otherwise 
{ if (n%2==0)   // even if n/2 has remainder of 0 
     return 1;  // 1 is true 
  else
     return 0;  // 0 is false 
} // even