POJ1001 Exponentiation

这个题目就是计算R的n次幂，poj中高精度浮点类型的计算对于java来说太简单了。代码如下：

import java.math.BigDecimal;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()){
            BigDecimal r = scanner.nextBigDecimal().stripTrailingZeros();
            int n = scanner.nextInt();
            BigDecimal result = r.pow(n);
            String resultString = result.toPlainString();
            if(resultString.startsWith("0.")){
                resultString = resultString.substring(1);
            }
            System.out.println(resultString);
        }

    }
}