#include <iostream> #include <cmath> using namespace std; int main() { cout << "Please enter a number: "; double a; cin >> a; const double EPSILON = 1E-14; double xnew = a; double xold; do { xold = xnew; xnew = (xold + a / xold) / 2; } while (fabs(xnew - xold) > EPSILON); cout << "The square root is " << xnew << "\n"; return 0; }