Can anyone tell me what's wrong with the code? I have tested it for many times, and it works completely fine. But the online judge keeps telling me wrong answer.

Code:
#include <iostream>
#include <cmath>
#include <iomanip>

using namespace std;

int main()
{
    double a[128];
    double tmp = 0;
    int cnt = 0;

    while(!cin.eof())
    {
        cin >> a[cnt];
        cnt += 1;
    }

    cout << setprecision(4) << fixed;

    for(int i = cnt - 1;i >= 0;i -= 1)
    {
        tmp = sqrt(a[i]);
        cout << tmp << endl;
    }

    return 0;
}

dont use cin.eof(), acm.timus cant check that, just use while(cin>>a[cnt])