POJ1001-java

 1 import java.math.BigDecimal;
 2 import java.util.Scanner;
 3 
 4 public class P1001 {
 5 
 6     public static void main(String[] args) {
 7         Scanner in = new Scanner(System.in);
 8         while (in.hasNext()){
 9             BigDecimal result = new BigDecimal(in.next());
10             int p = in.nextInt();
11             result = result.pow(p);
12             //strpTralingZeros去掉尾0
13             //不能用toString, 否则可能科学计数
14             String resultStr=result.stripTrailingZeros().toPlainString();
15             if(resultStr.startsWith("0.")){
16                 resultStr=resultStr.substring(1);
17             }
18             System.out.println(resultStr);
19         }
20         in.close();
21     }
22 
23 }    

1 resultStr = resultStr.replaceAll("^0","");