Recursive

#include <iostream>
#include <string>
#include <iomanip>
#include <windows.h>

using namespace std;

int RecursionF (int num);
int main(){
    LARGE_INTEGER startTime,endTime,freq;
    double times;
    QueryPerformanceFrequency(&freq);
    int num;
    cout<<"enter a num "<<endl;
    cin>>num;
    QueryPerformanceCounter(&startTime);
    cout<<RecursionF(num)<<endl;
    QueryPerformanceCounter(&endTime);
    
    times=((double)endTime.QuadPart-(double)startTime.QuadPart)
           /freq.QuadPart;
    
    cout<<"used time : ";
    cout<<fixed<<setprecision(20)<<times<< ' s ' <<endl;
    system ("pause");
    return 0;
}

int RecursionF (int n){
    if (n==1){
       return 0;}
    if (n%2==0){
       n= n/2;}
    else
       n=3*n+1;
    
    return 1+RecursionF(n);}