C# 第3次实验报告：面向对象编程基础

using System;

namespace _3_1
{
	class Student
	{
		public string Name;
		public double Age;
		public string Hobby;

		public void hello()
		{
			Console.WriteLine("我叫{0}，我今年{1}岁了，我的爱好是{2}。", this.Name, this.Age, Hobby);
		}
	}
}

using System;

namespace _3_1
{
	class Teacher
	{
		public string Name;
		public double Age;
		public double WorkingAge;

		public void hello()
		{
			Console.WriteLine("我叫{0}，我今年{1}岁了，我的工龄是{2}。", this.Name, this.Age, WorkingAge);
		}
	}
}

using System;

namespace _3_1
{
	class Program
	{
		static void Main(string[] args)
		{
			Student stu = new Student()
			{
				Name = "Coco",
				Age = 22,
				Hobby = "coding"
			};
			stu.hello();

			Teacher t = new Teacher();
			t.Name = "Mr. Smith";
			t.Age = 42;
			t.WorkingAge = 15;
			t.hello();

			Console.WriteLine("\nPress any key to quit.");
			Console.ReadKey();
		}
	}
}

using System;

namespace _3_2
{
	class Person
	{
		public string Name;
		public string Blood;

		public Person(string name, string blood)
		{
			Name = name;
			Blood = blood;
		}

		public void printName()
		{
			Console.WriteLine("我叫{0}。", this.Name);
		}

		public void printBlood()
		{
			Console.WriteLine("我的血型是{0}。", this.Blood);
		}
	}
}

using System;

namespace _3_2
{
	class Program
	{
		static void Main(string[] args)
		{
			Person p = new Person("江涛", "AB");
			p.printName();
			p.printBlood();
			Console.WriteLine("\nPress any key to quit.");
			Console.ReadKey();
		}
	}
}

using System;

namespace _3_3
{
	class Circle
	{
		public double R;
		public Circle(double r)
		{
			R = r;
		}

		public void c()
		{
			Console.WriteLine("周长{0}。", 2*Math.PI* R);
		}

		public void s()
		{
			Console.WriteLine("面积{0}。", Math.PI * R * R);
		}
	}
}

using System;

namespace _3_3
{
	class Program
	{
		static void Main(string[] args)
		{
			Circle c = new Circle(1);
			c.c();
			c.s();
			Console.WriteLine("\nPress any key to quit.");
			Console.ReadKey();
		}
	}
}

using System;

namespace _3_4
{
	class Test
	{
		public double[] Nums;
		public Test(double[] numbers)
		{
			Nums = numbers;
		}
		public void average()
		{
			double s=0;
			foreach (var item in Nums)
			{
				s += item;
			}
			Console.WriteLine("均值为：{0}。", s/Nums.Length);
		}
	}
}

using System;

namespace _3_4
{
	class Program
	{
		static void Main(string[] args)
		{
			double[] n = { 1, 1, 2 };
			Test t=new Test(n);
			t.average();
			Console.WriteLine("\nPress any key to quit.");
			Console.ReadKey();
		}
	}
}

using System;

namespace _3_5
{
	class Program
	{
		static void Main(string[] args)
		{
			string str = "2008-08-08";
			DateTime date = DateTime.Parse(str);
			Console.WriteLine(date.ToLongDateString());
			Console.WriteLine("\nPress any key to quit.");
			Console.ReadKey();
		}
	}
}

using System;
using System.Linq;
using System.Text;

namespace _3_6
{
	class Program
	{
		static void Main(string[] args)
		{
			string a = "abc";

			var query = a.Reverse();

			StringBuilder sbStr = new StringBuilder();
			foreach (var item in query)
			{
				sbStr.Append(item);
			}

			Console.WriteLine(sbStr.ToString());

			string s = "abc";
			char[] ss = s.ToCharArray();
			StringBuilder sb = new StringBuilder();
			for (int i = ss.Length - 1; i >= 0; i--)
			{
				sb.Append(ss[i]);
			}
			Console.WriteLine(sb.ToString());

			Console.WriteLine("\nPress any key to quit.");
			Console.ReadKey();
		}
	}
}

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

namespace _3_7
{
	class Program
	{
		static void Main(string[] args)
		{
			string[] arr = "hello c sharp".Split(' ');
			string result = string.Empty;
			for (int i = arr.Count() - 1; i >= 0; i--)
			{
				result += arr[i] + " ";
			}
			Console.WriteLine("反转后的英文句子是：\n方法一：" + result);

			Console.Write("方法二：");
			string[] arr2 = "hello c sharp2".Split(' ');
			Array.Reverse(arr2);
			foreach (var item in arr2)
			{
				Console.Write(item + " ");
			}
			Console.WriteLine();

			Console.WriteLine("\nPress any key to quit.");
			Console.ReadLine();
		}
	}
}

using System;

namespace _3_8
{
	class Program
	{
		static void Main(string[] args)
		{
			//练习：从email中提取用户名和域名 abc@
			string str = "abc@";
			int index = str.IndexOf('@');
			string strUser = str.Substring(0, index);
			string strDNS = str.Substring(index + 1);
			Console.WriteLine(strDNS);
			Console.WriteLine(strUser);

			Console.WriteLine("\nPress any key to quit.");
			Console.ReadKey();
		}
	}
}

using System;

namespace _3_9
{
	class Program
	{
		static void Main(string[] args)
		{
			Random random = new Random();
			//for (int i = 0; i < 10; i++)
			//	("The latest verification code is: " + getVerificationCode(random));
			inputCode(getVerificationCode(random));

			Console.WriteLine("\nPress any key to quit.");
			Console.ReadKey();

		}

		public static void inputCode(string code)
		{
			Console.WriteLine("The latest verification code is: " + code);
			Console.WriteLine("Please input the latest verification code.");
			while (true)
			{
				string s = Console.ReadLine();
				if(s==code)
				{
					Console.WriteLine("Congratulation, you passed the validation.");
					break;
				}
				Console.WriteLine("Sorry, your input is wrong, please try again.");
			}
		}

		public static string getVerificationCode(Random random)
		{
			string str = "";
			for (int i = 0; i < 4; i++)
			{
				int key = random.Next(3);
				switch (key)
				{
					case 0:
						int code1 = random.Next(10);
						str += code1;
						break;
					case 1:
						char code2 = (char)(random.Next(26) + 65);
						str += code2;
						break;
					case 2:
						char code3 = (char)(random.Next(26) + 97);
						str += code3;
						break;
				}
			}
			return str;
		}
	}
}