谭叔叔说要少用goto，除非迫不得已。。。。会打乱结构的

#include "stdafx.h"
#include<iostream>
using namespace std;
int a;
int b;
int n;
int _tmain(int argc, _TCHAR* argv[])
{
while(1) {
    n=1;
    cout<<"请输入检测数字:";
    cin>>a;
    cout<<"\\n";
    while(a!=1){
    if(a%2==0)
        a=a*0.5;
    else
        a=(a*3+1)/2;
    cout<<"第"<<n<<"个数:"<<a<<"\\t";
    n++;
    };
    cin>>b;
}
    return 0;
}