Problem Solving►UVa

UVa 748 - Exponentiation

Contents

  1. 1. Problem
  2. 2. Solution
  3. 3. Code

Problem

中文網址

Solution

練習 Java 中…

Code

UVa 748
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import java.util.Scanner;
import java.math.BigDecimal;

public class Main
{

    public static void main(String[] args)
    {
        Scanner cin = new Scanner(System.in);

        while (cin.hasNext())
        {
            BigDecimal num = cin.nextBigDecimal();
            int n = cin.nextInt();
            num = num.pow(n);

            String s = num.toPlainString();
            if (s.charAt(0) == '0')
                s = s.substring(1);

            int end = s.length();
            while (s.charAt(end - 1) == '0')
                end--;
            if (s.charAt(end - 1) == '.')
                end--;
            s = s.substring(0, end);
            System.out.println(s);
        }
    }
}