nyoj-155-求高精度幂(java大数)

题目链接

import java.util.*;
import java.math.*;
public class Main{

    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        while (cin.hasNext()) {
            BigDecimal numa = cin.nextBigDecimal();
            int numb = cin.nextInt();
            String str = numa.pow(numb).stripTrailingZeros().toPlainString();
            if (str.startsWith("0.")) {//如果开头是0.那么从小数点开始输出
                System.out.println(str.substring(1));
            } else {
                System.out.println(str);
            }
        }
    }
}