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);
}
}
}