C#学习笔记之——枚举、结构体

一、枚举

枚举类的赋值，值跟前一个的值有关，前一个值加一

例子：

enum Season: byte{
  Spring=1,Summer,Fall,Winter
  }

enum week{
MON=0,TUE=1,WED,THU,FRI,SAT,SUN
}

使用：

Season color = Season.Spring;
Console.WriteLine (color);

int n = Console.ReadLine () - 48;
switch ((week)n) {
case week.SUN:				

	Console.WriteLine ("have fun");
	break;
case week.MON:
	Console.WriteLine ("work");
	break;
case week.TUE:
	Console.WriteLine ("work");
	break;
case week.WED:
	Console.WriteLine ("work");
	break;
case week.THU:
	Console.WriteLine ("work");
	break;
case week.FRI:

	Console.WriteLine ("work");
	break;
case week.SAT:

	Console.WriteLine ("have fun");
}

二、结构体

结构体的字段不能赋初值

结构体构造方法必须给每个字段赋初值

有五个学生，用结构体存储姓名、学号、年龄、分数；

1、找出最高分的学生，并输出他的信息

2、按照年龄从小到大排序，并输出

using System;

namespace Lesson11
{
	public struct Person
	{
		public string name;
		public int age;
		public string studentID;
		public int score;
	}
	enum Gender {
		male,female
	}
	class MainClass
	{
		public static void Main (string[] args){

			Person[] persons = new Person[5];
			persons[1].name = "Araina";
			persons[1].studentID = "01";
			persons[1].age = 20;
			persons[1].score = 98;

			persons[0].name = "Michael";
			persons [0].studentID = "02";
			persons[0].age = 22;
			persons [0].score = 95;

			persons[2].name = "Selena";
			persons [2].studentID = "03";
			persons[2].age = 18;
			persons [2].score = 100;

			persons[3].name = "Ed";
			persons [3].studentID = "04";
			persons[3].age = 25;
			persons [3].score = 99;

			persons[4].name = "P!nk";
			persons [4].studentID = "05";
			persons[4].age = 27;
			persons [4].score = 94;

			string personWhoGetHighScore = persons[0].name;
			int highScore = persons[0].score;
			int i = 1;
			for ( ; i < 5; i++) {
				if(persons[i].score > highScore){
					highScore = persons [i].score;
					personWhoGetHighScore = persons [i].name;
				}
			}
			int theOne = 0;
			for ( ; i < 5; i++) {
				if(persons[i].score == highScore){
					theOne = i;
				}
			}
			Console.WriteLine ("分数最高的是：" + personWhoGetHighScore);
			Console.WriteLine ("年龄:" + persons [theOne].age);
			Console.WriteLine ("学号:" + persons [theOne].studentID);
			Console.WriteLine ("分数:" + highScore);

			Person temp;
			for (i = 0; i < persons.Length-1; i++) {
				for (int j = 0; j < persons.Length-(i+1); j++) {
					if(persons[j].age > persons[j+1].age)
					{
						temp = persons [j];
						persons [j] = persons [j + 1];
						persons [j + 1] = temp;
					}
				}

			}
			foreach (Person one in persons) {
				Console.WriteLine ("name:{0} age:{1}", one.name, one.age);
			}
		}
	}
}