Donet自己学--1.(2007-6-29)

Donet自己学--1.(2007-6-29) 

using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication20070629BridCT1
{
    class Program
    {
        static void Main(string[] args)
        {
            //1.Hello Wrold
            Console.WriteLine("Hello World!!");
            Console.WriteLine("这是我第一个程序!!");
            //=====================================

            //2.int,double,string类型的输入。
            int intA;
            double dblA;
            string strA;
            intA = 3;
            dblA = 3.142;
            strA = "Hello World.";
            Console.WriteLine("这是integer类型变量:");
            Console.WriteLine(intA);
            Console.WriteLine("这是double类型变量:");
            Console.WriteLine(dblA);
            Console.WriteLine("这是string类型变量:");
            Console.WriteLine(strA);

            //Console.ReadLine();
            //=====================================

            //3.switch的用法，Console.ReadLine和Console.WriteLine()后面不能加参数，否则会显示错误：“ReadLine”方法没有采用“1”个参数的重载.如果直接写，回产生错误：无法将类型“string”隐式转换为“int”。

            Console.WriteLine("请输入一组数字（1-7），分别对应周一到周日！");
            int strNum;
            strNum = Convert.ToInt32(Console.ReadLine());
            switch (strNum)
            { 
                case 1:
                    Console.WriteLine("您选择的是周一！");
                    break;
                case 2:
                    Console.WriteLine("您选择的是周二！");
                    break;
                case 3:
                    Console.WriteLine("您选择的是周三！");
                    break;
                case 4:
                    Console.WriteLine("您选择的是周四！");
                    break;
                case 5:
                    Console.WriteLine("您选择的是周五！");
                    break;
                case 6:
                    Console.WriteLine("您选择的是周六！");
                    break;
                case 7:
                    Console.WriteLine("您选择的是周日！");
                    break;
                default:
                    break;
            }
        }
    }
}