7.28

int[] shu = new int[] { 1,2,3};
//二维数组
int [,] array = new int[4,2];
//4，表示有四个一维数组
//2，表示每一个一维数组有2个元素
int[,] shuzu = new int[,]
{
{1,2},
{3,4},
{5,6},
{7,8}
};
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 2; j++)
{
Console.Write(shuzu[i,j]+" ");
}
}

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();
}

打印出每个人的语数英成绩
Console.Write("请输入班级人数：");
int n = int.Parse(Console.ReadLine());
double[,] score = new double[n, 3];
for (int i = 0; i < n; i++)
{
Console.Write("请输入第{0}个人的语文成绩：",i+1);
score[i, 0] = double.Parse(Console.ReadLine());
Console.Write("请输入第{0}个人的数学成绩：", i + 1);
score[i, 1] = double.Parse(Console.ReadLine());
Console.Write("请输入第{0}个人的英语成绩：", i + 1);
score[i, 2] = double.Parse(Console.ReadLine());
}
Console.WriteLine("所有人的语数英成绩输入完毕，请按回车键打印！");
Console.ReadLine();
for (int i = 0; i < n; i++)
{
Console.WriteLine("第{0}个人的语文成绩是{1}，数学成绩{2}，英语成绩{3}。",i+1,score[i,0],score[i,1],score[i,2]);
}
//求语文总分
double sum = 0;
for (int i = 0; i < n; i++)
{
sum += score[i, 0];
}
Console.WriteLine(sum);
Console.ReadLine();

//多维数组
//int[, ,] shuzu = new int[4, 3, 2];
////4，表示有四个二维数组
////3，表示每个二维数组里面有3个1维数组
////2,表示每个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();

{
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
//判断是否包含
Console.WriteLine(al1.Contains("2"));
//获取第一次出现该元素的索引号
Console.WriteLine(al1.IndexOf(11));
//获取最后一次出现该元素的索引号
Console.WriteLine(al1.LastIndexOf(2));
//插入某个索引位置某个元素
al.Insert(2,"Hello");

//移除某个第一次出现的元素
al.Remove("hello");
//移除某个索引位置的元素
al.RemoveAt(3);

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

//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();