do...while

#include<iostream>
using namespace std;
int n;
int main(){
    cin >> n;
    do{
        if (n%2){
            cout << n << "*3+1=";
            n=n*3+1;
            cout << n << endl;
        }
        else{
            cout << n << "/2=";
            n/=2;
            cout << n << endl;
        }
    }
    while (n>1);
    cout << "End" << endl;
    return 0;
}