例7-5.txt

Java大学实用教程 耿祥义编著 课件 PPT

import java.math.*;
class Example
{
   public static void main(String args[])
   {
       BigInteger n1=new BigInteger("987654321987654321987654321"),
                  n2=new BigInteger("123456789123456789123456789"),
                  result=null;
       System.out.println("n1的二进制表示:"+n1.toString(2));
       System.out.println("n2的八进制表示:"+n2.toString(8));
result=n1.add(n2);
       System.out.println("和:"+result.toString());
       result=n1.subtract(n2);
       System.out.println("差:"+result.toString());
       result=n1.multiply(n2);
       System.out.println("积:"+result.toString());
       result=n1.divide(n2);
       System.out.println("商:"+result.toString());
       BigInteger m=new BigInteger("333444777"),
                  COUNT=new BigInteger("0"),
                  ONE=new BigInteger("1"),
                  TWO=new BigInteger("2");
       for(BigInteger i=TWO;i.compareTo(m)<0;i=i.add(ONE))
        {
           if((n1.remainder(i).compareTo(BigInteger.ZERO))==0)
            {
               COUNT=COUNT.add(ONE);
               System.out.println("因子:"+i.toString());
            }
        }
       System.out.println(m.toString()+"一共有"+COUNT.toString()+"个因子");    
   }
}