#include <iostream>
#include <cmath>

using namespace std;

int main()
{
  double hypoteneuse(double a, double b);
  double a, b, c; // three sides of a right triangle
  cout << "Enter the length of side a of right triangle: ";
  cin >> a;
  cout << "Enter the length of side b of a right triangle: ";
  cin >> b;
  c = hypoteneuse(a, b);
  cout << "The length of the hypoteneuse c is " << c << endl;
  return 0;
}

double hypoteneuse(double a, double b)
{
  double c = sqrt(a*a + b*b);
  return c;
}