杭电 1164 数论

       一道简单的数论题，就是把任意一个数分解成几个质数之积。。。。。。

题目：

Eddy's interest is very extensive, recently he is interested in prime number. Eddy discover the all number owned can be divided into the multiply of prime number, but he can't write program, so Eddy has to ask intelligent you to help him, he asks you to write a program which can do the number to divided into the multiply of prime number factor .

 

Input

The input will contain a number 1 < x<= 65535 per line representing the number of elements of the set.

 

Output

You have to print a line in the output for each entry with the answer to the previous question.

 

Sample Input

   
   
   
   

    
    
    
    11
9412
   
   
   
   

 

Sample Output

   
   
   
   

    
    
    
    11
2*2*13*181
   
   
   
   

 

ac代码：

#include <iostream>
#include <cmath>
using namespace std;
int prime(int x)
{
  for(int i=2;i<=sqrt(double(x));++i)
  {
    if(x%i==0)
		return 0;
  }
  return 1;
}
int main()
{
  int n;
  while(cin>>n)
  {
    if(prime(n))
		cout<<n<<endl;
	else
	{
	  while(n!=1)
	  {
	    for(int i=2;i<=n;++i)
	    {
	      if(n%i==0)
		  {
		    if(prime(i))
		    { 
		      n/=i;
			  cout<<i;
			  if(n!=1)
				cout<<"*";
			  break;
		     }
		   }
	     }
	  }
	  cout<<endl;;
	}
  }
  return 0;
}