All compilers are succeed with this code.
What's wrong?


#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main()

{
  double buffer[128*1024];
  unsigned long long number, n=0;
  while(cin >> number)
  {
    buffer[n]=pow(number,1.0/2.0);
    n++;
  }
  for (int i=n-1;i>=0;i--)
  {
    cout << fixed << setprecision(4) << buffer[i] << endl;
  }
  return 0;
}