Java大数处理

 1 import java.io.*;
 2 import java.math.*;
 3 import java.util.*;
 4 public class Main {
 5     public static void main(String[] argc)
 6     {
 7         Scanner cin=new Scanner(new BufferedInputStream(System.in));
 8         while(cin.hasNext())
 9         {
10             BigDecimal x=cin.nextBigDecimal();
11             BigDecimal y=BigDecimal.ONE;
12             int n=cin.nextInt();
13             int i;
14             for(i=1;i<=n;i++)
15             {
16                 y=y.multiply(x);
17             }
18             y=y.stripTrailingZeros(); //删除尾部零
19             String s=y.toPlainString(); //取消科学计数显示
20             if(s.substring(0,1).compareTo("0")==0) s=s.substring(1);
21             System.out.println(s);
22         }
23     }
24 
25 }