大家帮忙看下,这是个分别输出小数整数部分和小数部分的程序，如5.2，输出：num_f=5，num_l=2，小数部分的输出有问题，谁能解决
#include <iostream>
using std::cin;
using std::cout;
using std::endl;
int main()
{
    float num;
    int num_f;
    int n;
    cout<<"Please enter the number:"<<endl;
    cin>>num;
    num_f=int(num);
    cout<<"num_f="<<num_f<<endl;
    float num2=num-num_f;
    cout<<"num_l=";
    for( ; ; )
    {
        num2=num2*10;
        n=int(num2);
        cout<<n;
        if((num2-n)==0)
            break;
        else
            num2=num2-n;
    }
    cout<<endl;
    return 0;
}

没人帮我啊