Testing Standard Deviation calculation

stddevcalc_test.cpp

int main() {
    StdDevCalc c, c2;
    StdDevCalcKnuth k, k2;

    for(int i = 0; i < 100; i++) {
        c.append(i);         // Small values
        k.append(i);

        c2.append((double) i * 3e151);         // Very very large values
        k2.append((double) i * 3e151);
    }

    cout << c.get_std_dev() << endl;  // 29.0115
    cout << k.get_std_dev() << endl;  // 29.0115

    cout << endl;

    cout << c2.get_std_dev() << endl; // inf
    cout << k2.get_std_dev() << endl; // 8.70345e+152
}