C#语言的基础知识

static void Main(){
}

int var1 = 5;
System.Console.WriteLine("The value of var1 is {0}",var1);

{
int var1 = 5;
System.Console.WriteLine("The value of var1 is {0}",var1);
}

System.Console.WriteLine("Hello world1.");
System.Console.WriteLine("Hello world2.");
System.Console.WriteLine("Hello world3.");

Console.WriteLine("两个数相加{0}+{1}={2}",3,34,34);

Console.WriteLine("Three integers are {1},{0} and {1}",3,5);

  int age;
  int hp;
  string name;

int age ;

age = 25;

int age = 25;

string name1,name2;

switch 语句必须遵循下面的规则：

enum <typeName>{
<value1>,
<value2>,
<value3>,
.....
<valueN>
}

enum WeekDay
{ Sunday，Monday，Tuesday，Wednesday，Thursday，Friday，Saturday }
WeekDay day;

namespace CalculatorApplication
{
    class NumberManipulator
    {
        public int factorial(int num)
        {
            /* 局部变量定义 */
            int result;
            if (num == 1)
            {
                return 1;
            }
            else
            {
                result = factorial(num - 1) * num;
                return result;
            }
        }
   
        static void Main(string[] args)
        {
            NumberManipulator n = new NumberManipulator();
            //调用 factorial 方法
            Console.WriteLine("6 的阶乘是： {0}", n.factorial(6));
            Console.WriteLine("7 的阶乘是： {0}", n.factorial(7));
            Console.WriteLine("8 的阶乘是： {0}", n.factorial(8));
            Console.ReadLine();
        }
    }
}

double[] balance;

double[] balance = new double[10];

double[] balance = new double[10];
balance[0] = 4500.0;

double[] balance = { 2340.0, 4523.69, 3421.0};

int [] marks = new int[5]  { 99,  98, 92, 97, 95};

int [] marks = new int[]  { 99,  98, 92, 97, 95};

int [] marks = new int[]  { 99,  98, 92, 97, 95};
int[] score = marks;

using System;
namespace ArrayApplication
{
   class MyArray
   {
      static void Main(string[] args)
      {
         int []  n = new int[10]; /* n 是一个带有 10 个整数的数组 */
         int i,j;
         /* 初始化数组 n 中的元素 */        
         for ( i = 0; i < 10; i++ )
         {
            n[ i ] = i + 100;
         }
         /* 输出每个数组元素的值 */
         for (j = 0; j < 10; j++ )
         {
            Console.WriteLine("Element[{0}] = {1}", j, n[j]);
         }
         Console.ReadKey();
      }
   }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Test01
{
   class Program
    {
       static void Main(string[] args)
        {
           int[] arr = { 1, 2, 3, 4, 5 };                //定义一个一维数组，并为其赋值
            foreach (int n in arr)                    //使用foreach语句循环遍历一维数组中的元素
                Console.WriteLine("{0}", n + " ");
            Console.WriteLine();
        }
    }
}

    int[,]arr=newint[2,2];

   int[,]arr=newint[2,2]{{1,2},{3,4}};

int[,]arr=newint[,]{{1,2},{3,4}};

int [] l={1,2,3};
int [] l2=1;
l[0]=9;
Console.WriteLine("l2[0]"+l2[0]);

class MyDerivedClass: MyBaseClass
{
　　// functions and data members here
}

public class MyDerivedClass: MyBaseC1ass, IInterface1, IInterface2
{
    // etc.
}

public struct MyDerivedstruct: IInterface1, IInterface2
{
    // etc.
}

/// <summary>
/// 狗(多态：重载事例)
/// </summary>
class Dog
{
    /// <summary>
    /// 叫
    /// </summary>
    public void Shout()
    {
        Console.WriteLine("汪!");
    }
    /// <summary>
    /// 叫(重载方法)
    /// </summary>
    public void Shout(int count)
    {
        int i = 0;
        string shout = "";
        do
        {
            shout += "汪！";
            i++;
        } while (i <= count);
        Console.WriteLine(shout);
    }
}