C#第一节上机课

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            string strInput = Console.ReadLine();            Console.WriteLine("输入的内容是：{0}",strInput);            Console.ReadKey(false);        }    }}using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            Console.WriteLine("请输入一个字符：");            char c = Console.ReadKey().KeyChar;            Console.WriteLine("\r\n字符{0}的ASCII值是：{1}",c,(int)c);            Console.ReadKey(false);        }    }}using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            double y;            Console.WriteLine("请输入一个整数：");            double x = double.Parse(Console.ReadLine());            if ((int)x == 0)            {                Console.Write("f(x) = 0");            }            else            {                y = 1 / x;                Console.Write("f(x) = {0}", Math.Round(y,2));            }                        Console.ReadKey(false);        }    }}using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            double y;            Console.WriteLine("请输入一个整数：");            double x = double.Parse(Console.ReadLine());            if ((int)x == 0)            {                Console.Write("f(x) = 0");            }            else            {                y = 1 / x;                String result = y.ToString("#0.0");                Console.Write("f(x) = {0}", result);            }                        Console.ReadKey(false);        }    }}

初识C#，编写程序有点困难，光是输入就搞的一头雾水啊，还得类型转换，好麻烦啊