POJ 1004 Financial Management

#include <iostream>
#include <vector>

using namespace std;

int main ()
{
double month = 0, total = 0;
int i = 0;
int average = 0;
while(cin>>month)
{
total = total + month;
if ( i == 11 )
{
total = total / 12;
average = total * 1000;
if ( average % 10 < 5)
{
average = average / 10;
}
else
{
average = average / 10 + 1;
}
cout << "$" << ((double)average)/100<<endl;

i = 0;
total = 0;
average = 0;
month = 0;
}

++i;
}

return 0;
}