POJ 1001(高精度运算)

package com.njupt.acm;import java.math.BigDecimal;import java.util.Scanner;public class POJ_1001 {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);while(scanner.hasNext()){double r = scanner.nextDouble();int n = scanner.nextInt();BigDecimal R = new BigDecimal(r + "");R = R.pow(n);String ans = R.stripTrailingZeros().toPlainString();if(ans.startsWith("0.")){ans = ans.substring(1);}System.out.println(ans);}}}