// Return the square root of the sum of two squares

#include <iostream>
#include <cmath>
using namespace std;

double sqrtOfSumOf2Squares(double x, double y);

int main()
{
    cout << sqrtOfSumOf2Squares(3.0,4.0) << endl;
    cout << sqrtOfSumOf2Squares(1,1) << endl;
    cout << sqrtOfSumOf2Squares(1,2) << endl;

    double z = sqrtOfSumOf2Squares(2.5,6.7);

    cout << sqrt(sqrtOfSumOf2Squares(5,6)) << endl;
}

double sqrtOfSumOf2Squares(double x, double y)
{
    return sqrt(x * x + y * y);
}