Could someone help me ?

#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
    double outputNumbers[100000];
    double number;
    int index;

    index = -1;
    while (cin.fail() == false)
    {
        cin >> outputNumbers[++index];
    }

    cout << fixed;
    cout << setprecision(4);

    while (index > 0)
    {
        cout << sqrt(outputNumbers[--index]) << endl;
    }

    return 0;
}

I have rewrite the program, using vectors but now I receive wrong answer...

#include <iostream>
#include <iomanip>
#include <vector>

using namespace std;

int main()
{
    vector<double> myVector;

    double value;

    while (cin.fail() == false)
    {
        cin >> value;
        myVector.push_back(sqrt(value));
    }

    myVector.pop_back();

    cout << fixed;
    cout << setprecision(4);

    for (int i = 0; i < myVector.size(); i++)
    {
        cout << myVector[i] << endl;
    }


    return 0;
}