C#实验二

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
    class Program
    {
        enum MyEn { a = 101, b, c = 207, d, e, f, g };
        static void Main(string[] args)
        {
            //实验一
            //double r;
            //Console.WriteLine("请输入圆的半径");
            //r = double.Parse(Console.ReadLine());
            //Console.WriteLine("圆的面积为" + Math.PI * r * r);
            //Console.WriteLine("圆的周长为" + 2 * Math.PI * r);


            //    //实验二
            //int x = (int)MyEn.e;
            //Console.WriteLine("第五个值 = {0}", x);
            //Console.Read();

            //    //实验三
            //int m = 3;
            //int n = 5;
            //Console.WriteLine("第一组：");
            //bool first = ((m == m++) && (n == n--));
            //Console.WriteLine("first = {0} m = {1} n = {2}", first, m, n);
            //m = 3;
            //n = 5;
            //Console.WriteLine("第二组：");
            //bool second = ((m == ++m) || (n == n--));
            //Console.WriteLine("second = {0} m = {1} n = {2}", second, m, n);

            //    //实验四
            //int a = 1, b = 2, c = 3;
            //Console.WriteLine(((((c++ + --a) * b) != 2) && true));

        }
    }
}