3月12日 数组

数组：

一维数组：

第一种定义方式：

int[] shuzu = new int[5];
            //shuzu[0] = 1;
            //shuzu[1] = 2;
            //shuzu[2] = 3;
            //shuzu[3] = 4;
            //shuzu[4] = 5;
            //Console.WriteLine(shuzu[4]);

第二种定义方式：

int[] shuzu = new int[]{1，2，3，4，5};

//输入班级人数，根据人数，挨个输入成绩，求平均分；
            Console.Write("请输入班级人数");
            int a = int.Parse(Console.ReadLine());
            double[] fen = new double[a];
            double sum = 0;
            for (int i = 0; i < a; i++)
            {
                Console.Write("第" + (i + 1) + "个人的成绩是");
                fen[i] = double.Parse(Console.ReadLine());
                sum += fen[i];
            }
            Console.WriteLine("平均分是" + sum / a);
            Console.ReadLine();

二维数组：

//二维数组
            //int[,] shuzu = new int[3, 4];//3个数组，每个数组有4个
            //int[,] shuzu = new int[,] { };

//输入班级人数，将每个人的
            //语文、数学、英语成绩输入二维数组；
            Console.Write("输入班级人数");
            int a = int.Parse(Console.ReadLine());
            double[,] fen = new double[a, 3];
            for (int i = 0; i < a; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    if (j == 0)
                    {
                        Console.WriteLine("第" + (i + 1) + "个人的语文成绩是：");
                    }
                    if (j == 1)
                    {
                        Console.WriteLine("第" + (i + 1) + "个人的数学成绩是：");
                    }
                    if (j == 2)
                    {
                        Console.WriteLine("第" + (i + 1) + "个人的英语成绩是：");
                    }
                    fen[i, j] = double.Parse(Console.ReadLine());
                }
            }
            Console.ReadLine();

 string [,] shuzu = new string[7,7] 
            { 

            {"  ","  ","  ","■"," "," "," "},
            {"  ","  ","■"," ","■"," "," "},
            {"  ","■"," ","■"," ","■"," "},
            {"  ","  ","  ","■"," "," "," "},
            {"  ","  ","■","■","■"," "," "},
            {"  ","  ","■","■"," "," "," "},
            {"  ","■","■","■","■","■"," "},
            

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

三维数组：

//三维数组
            //int[, ,] shuzu = new int[3, 2, 4];//3个二维数组，每个二维数组有2个一维数组，每个一维数组有4个数据