一、二维数组
int [,] array = new int[5,3];//有五个一维数组，每一个一维数组有3个元素

/打印出来一个“王”这个字string[,] wang = new string[,]{

{" ","■","■","■","■","■"," "},
{" "," "," ","■"," "," "," "},
{" "," "," ","■"," "," "," "},
{" "," ","■","■","■"," "," "},
{" "," "," ","■"," "," "," "},
{" "," "," ","■"," "," "," "},
{"■","■","■","■","■","■","■"}
};
for (int i = 0; i < 7; i++)
{
for (int j = 0; j < 7; j++)
{
Console.Write(wang[i,j]);
}
Console.WriteLine();
}

输入班级人数，输入每个人的语数英成绩，求语文的总分，数学的平均分，英语的最高分和最低分

Console.Write("请输入班级人数：");
int n = int.Parse(Console.ReadLine());
double sum1= 0;
double sum2 = 0;
double[,] a = new double[n, 3];
for (int i = 0; i < n; i++)
{
Console.Write("请输入第"+(i+1)+"个人的语文成绩：");
a[i, 0] = double.Parse(Console.ReadLine());
sum1 +=a[i,0];
Console.Write("请输入第" + (i + 1) + "个人的数学成绩：");
a[i, 1] = double.Parse(Console.ReadLine());
sum2 += a[i, 1];
Console.Write("请输入第" + (i + 1) + "个人的英语成绩：");
a[i, 2] = double.Parse(Console.ReadLine());
}
for (int i = 0; i < n;i++ )
{
for (int j = i; j < n-1;j++ )
{
if (a[i,2]<a[j+1,2])

{
double zhong=a[i,2];
a[i, 2] = a[j + 1, 2];
a[j + 1, 2] = zhong;

}
}
}
Console.WriteLine("语文总分为"+sum1+"分");
Console.WriteLine("数学平均分为"+sum2/n+"分");
Console.WriteLine("英语最高分为"+a[0,2]);
Console.WriteLine("英语最低分为"+a[n-1,2]);
Console.ReadLine();

二、多维数组
int[, ,] shuzu = new int[4, 3, 2];//有四个二维数组,每个二维数组里面有3个1维数组,每个1维数组里面有2个元素
string[, ,] gao = new string[3, 4, 1]

{
{
{"张三"},{"李四"},{"王五"},{"赵六"}
},
{
{"冯七"},{"王八"},{"张全蛋"},{"小沈阳"}
},
{
{"刘能"},{"赵四"},{"赵本山"},{"岳云鹏"}
}
};

split 分离

一次性接收姓名、年龄、工作单位
Console.Write("请输入您的姓名、年龄、工作单位（**-**-**）：");
string quan = Console.ReadLine();
string[] array = quan.Split('-');
for (int i = 0; i < array.Length; i++)
{
Console.WriteLine(array[i]);
}
Console.ReadLine();

三、ArrayList集合

集合不同于数组，是一组可变数量的元素的组合，这些元素可能共享某些特征，需要以某种操作方式一起进行操作。一般来说，这些元素的类型是相同的。

集合与数组的区别：数组是连续的、同一类型数据的一块区域，而集合可以是不连续的、多种数据类型的。

ArrayList实现了IList、ICollection、IEnumerable接口；

ArrayList与Array的不同

(1)ArrayList是集合，而Array是数组；

(2)ArrayList是具体类，Array是抽象类；

(3)获取数组的元素数时使用Length属性，而获取ArrayList集合的元素数时使用Count属性；

(4)数组可以有多维，而ArrayList只能是一维。

ArrayList al = new ArrayList();//初始化
al.Add(5);
al.Add(3);
al.Add(6);
al.Add(4);
al.Add(1);
al.Add(2);
al.Add("2");
al.Add("hello");
al.Add(true);
al[3] = "你好";
al.Clear(); //移除所有元素
ArrayList al1 = new ArrayList();
al1 = (ArrayList)al.Clone();//克隆
Console.WriteLine(al1.Contains("2"));//判断是否包含
Console.WriteLine(al1.IndexOf(11));//获取第一次出现该元素的索引号
Console.WriteLine(al1.LastIndexOf(2));//获取最后一次出现该元素的索引号
al.Insert(2,"Hello");//插入某个索引位置某个元素

al.Remove("hello");//移除某个第一次出现的元素

al.RemoveAt(3);//移除某个索引位置的元素

al.Sort();//排序，升序
al.Reverse();//翻转整个集合
Console.WriteLine(al[2]);
Console.WriteLine(al.Count);
Console.ReadLine();

练习

//输入班级人数，输入每个人的姓名、语数英成绩进入集合
//求语文的总分，数学的平均分，
//英语的最高分的人的姓名及所有科目的分数（冒泡排序）

//0 姓名 4 8 12
//1 语文成绩5 9 13
//2 数学成绩6 10 14
//3 英语成绩7 11 15
Console.Write("请输入班级人数：");
int n = int.Parse(Console.ReadLine());
double yu = 0;
double shu = 0;
ArrayList al = new ArrayList();
for (int i = 0; i < n; i++)
{
Console.Write("请输入第{0}个人的姓名：",i+1);
al.Add(Console.ReadLine());
Console.Write("请输入第{0}个人的语文成绩：",i+1);
al.Add(double.Parse(Console.ReadLine()));
yu += double.Parse(al[al.Count - 1].ToString());
Console.Write("请输入第{0}个人的数学成绩：", i + 1);
al.Add(double.Parse(Console.ReadLine()));
shu += double.Parse(al[al.Count - 1].ToString());
Console.Write("请输入第{0}个人的英语成绩：", i + 1);
al.Add(double.Parse(Console.ReadLine()));
}
Console.WriteLine("所有信息输入完毕，请按回车键继续！");
Console.ReadLine();
Console.WriteLine("语文的总分是："+yu);
Console.WriteLine("数学的平均分是："+(shu/n));

for (int i = 3; i < 4*n-1; i+=4)
{
for (int j = i; j < 4 * n - 4; j += 4)
{
if (double.Parse(al[i].ToString()) < double.Parse(al[j + 4].ToString()))
{
//换姓名
object zhong = al[i - 3];
al[i - 3] = al[j + 1];
al[j + 1] = zhong;
//换语文
zhong = al[i - 2];
al[i - 2] = al[j + 2];
al[j + 2] = zhong;
//换数学
zhong = al[i - 1];
al[i - 1] = al[j + 3];
al[j + 3] = zhong;
//换英语
zhong = al[i];
al[i] = al[j + 4];
al[j + 4] = zhong;
}
}
}
Console.WriteLine("英语最高分的学生是{0}，英语分数是{1}，语文分数是{2}，数学分数{3}",al[0],al[3],al[1],al[2]);
Console.ReadLine();