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最新推荐文章于 2024-05-24 22:04:18 发布

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最新推荐文章于 2024-05-24 22:04:18 发布

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分类专栏： Java类文章标签：算法

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本文介绍了一个Java程序，该程序利用Scanner类读取用户输入，并使用一个预定义的e值来计算e的指定次数幂。计算结果会根据用户选择的小数位数进行格式化输出。

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import java.util.Scanner;
public class Main{
    public static final double e = 2.71828182845904523536028747135266249775724709369995957496696762772407663;
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        int T = in.nextInt();
        while(T-->0)
        {
            double t=1.0,sum=0;
            int a = in.nextInt();
            int b = in.nextInt();
            int r = in.nextInt();
            in.nextLine();
            for(int i=0;i<a;i++)
                t*=e;
                sum=b*t;
            switch(r)
            {
                case 1:
                System.out.printf("%.1f\n",sum);
                break;
                case 2:
                System.out.printf("%.2f\n",sum);
                break;
                case 3:
                System.out.printf("%.3f\n",sum);
                break;
                case 4:
                System.out.printf("%.4f\n",sum);
                break;
                case 5:
                System.out.printf("%.5f\n",sum);
                break;
            }
         }
        in.close();
      }
}