Question

我的家庭作业的最后一个问题。请帮忙。我很困惑，甚至不知道从哪里开始。如果你能给我一些评论，那就明白那会很棒。

开发一个菜单驱动的程序，输入一个数字X，并根据用户的选择，找到边RewriteEngine On RewriteMap lowercase int:tolower RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_URI} [A-Z] RewriteRule .* index.php/$0 [PT,L] RewriteRule (.*) ${lowercase:$1} [R,L]的正方形区域，半径为x [Area = x2]的圆的区域，或者边长为X [Area = 3.14 * x2]的等边三角形的面积。使用案例结构来处理用户的菜单选择。在C＃Math库中使用Sqrt方法。如果选择了无效的菜单选项，则显示错误消息

Answer 1

//Develop a menu-driven program that inputs a number X and, at the user’s option, 
//finds the area of a square with side x [Area = x2], the area of a circle with radius X [Area = 3.14 * x2],
//or the area of an equilateral triangle with side x [Area = Sqrt(3) / 4 * X2]. 
//Use a case structure to handle the user’s menu choice. Use the Sqrt method in the C# Math library.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = 0;
            double b = 0;

            Console.Write("Enter 1 for Area of square :\nEnter 2 For Area of Circle :\nEnter 3 for Equilateral Triangle :\n\n");
            aa:
            a = int.Parse(Console.ReadLine());

            switch (a)
            {
                case 1: 
                    Console.Write("\n\nEnter the Value of Side x : ");
                    b = double.Parse(Console.ReadLine());
                    double area = b * b;
                    Console.Write("\n\nThe area of square is {0}",area);
                    break;

                case 2:
                     Console.Write("\n\nEnter the Value of Side x : ");
                    b = double.Parse(Console.ReadLine());
                    double circle = (3.14) * (Math.Pow(b, 2));
                    Console.Write("\n\nThe Area of Circle is {0}",circle);
                    break;

                case 3:
                     Console.Write("\n\nEnter the Value of Side x : ");
                    b = double.Parse(Console.ReadLine());
                    double triangle = ((Math.Sqrt(3)) / 4) * (Math.Pow(b, 2));
                    Console.Write("\n\nThe Area of Triangle is {0}",triangle);
                    break;

                default:
                    Console.Write("\n\nEnter Correct Number : ");
                    goto aa;                    
            }
            Console.Read();
        }
    }
}

c＃math square root。找到一个区域的一面

1 个答案: