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Java将一个正整数分解质因数

2014-05-02 17:57 477 查看
  import java.io.*;

  public class Factorization

  {

  public void division(int input)

  {

  for(int i = 2; i <= input / 2; i++)

  {

  if(input % i == 0)

  {

  System.out.print(i + "*");

  division(input / i);

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  }

  }

  System.out.print(input);

  System.exit(0);//不能没有这句,否则结果会报错

  }

  public static void main(String[] args)

  {

  Factorization f = new Factorization();

  String s = "";

  try

  {

  BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

  s = in.readLine();

  }

  catch(IOException e){}

  int input = Integer.parseInt(s);

  System.out.print(input + "的分解质因数为:" + input + "=");

  f.division(input);

  }

  }
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