poj 1001 java

小数的幂计算

注意

toPlainString的使用，表示非科学计数法

import java.io.*;
import java.awt.*;
import java.math.*;
import java.text.*;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(new BufferedInputStream(System.in));
        while (scan.hasNext()) {
            BigDecimal n = scan.nextBigDecimal();
            int d = scan.nextInt();
            n = n.pow(d);
            String s = new String(n.toPlainString());
            int flag1 = 0;
            while (s.charAt(flag1) == '0')
                flag1++;
            int end = s.length()-1;
            while (s.charAt(end) == '0')
                end--;
            if (s.charAt(end) == '.')
                end--;
            for (int i = flag1; i <= end; i++)
                System.out.print(s.charAt(i));
            System.out.println();
        }
    }
}