computing fibonacci sum of even numbers upto 4,000000

fibonacci

#include <iostream>
int main()
{
    using namespace std;
  int num=0,num1=1,num0=0,sum=0;
   while(num<=4000000)
   {num=num1+num0;
   num0=num1;
   num1=num;
   if(num%2==0)
sum+=num;
   }
   printf("%d",sum);
	cin.clear();
cin.ignore(255, '\n');
cin.get();
}