what mean r=even(a) in this program

Question

#include <iostream>
#include <string.h>
#include <conio.h>

//write a program that input a number in main function
//and pass to the function ,that function find
//the number is Even or Odd
//and return back to the main function.
int even (int n);
using namespace std;
main()
{
int r, a;
cin>>a;
r=even(a);
if(r==1)
cout<<"even"<<a;
else
cout<<"Odd"<<a;
}
int even(int n)
{
if(n%2==0)
{
return 1;
}
else
return 0;

}

Answer 1

thank you!

Answer 2

Is this code working?
I don't think that it would be working

Answer 3

offcourse its working

Answer 4

Edit main () to int main ()

Answer 5

i know but its also works