hailstone.cpp

#include <iostream>using namespace std;int hailstone(int n){int length = 1;while (n > 1){n % 2 ? n = 3 * n + 1 : n /= 2;length++;}return length;}int main(){int n;cout << "Please input a integer: " << endl;cin >> n;int length;length = hailstone(n);cout << "The length of hailstone(" << n << ") is " << length << endl;}