cin>>n;
cout<<n;
while (n>=10)//输出变为个位数过程
{
    int i=0;
    m=1;
    while (n)
    {
        a[++i]=n%10;
        n/=10;
        m*=a[i];
    }
    cout<<" "<<m;
    n=m;
}

while