编写算法对输入的一个整数，判断它能否被3,5,7整除，并输出一下信息之一：

#include <iostream>
using namespace std;

int main()
{
int tmp;
cout<<"please enter a number:";
while(cin>>tmp)
{
int k = (tmp%3 == 0) + (tmp%5 == 0)*2 +(tmp%7 == 0)*4;
switch(k)
{
case 0: cout<<"none."<<endl;break;
case 1: cout<<"3."<<endl;break;
case 2: cout<<"5."<<endl;break;
case 3: cout<<"3 ,5"<<endl;break;
case 4: cout<<"7."<<endl;break;
case 5: cout<<"3,7"<<endl;break;
case 6: cout<<"5,7"<<endl;break;
case 7: cout<<"3,5,7"<<endl;
}
cout<<"please enter a number:";
}
return 0;
}