二维数组，多维数组
//定义二维数组 int[,] a=new int [3,2] //3表示有三个一维数组，2表示每一个一位数组中有两个元素int[,] a=new int [3,4]{ {1,2,3,4}, {5,6,7,8}, {9,8,7,6} }; //打印出来 for (int i = 0; i < 3;i++ ) { for(int j=0;j<4;j++) { Console.Write(a[i,j]+"\t"); } Console.WriteLine(); } 
//输入班级人数，输入每人的语数英成绩再打印出来,求语文两个最高分，数学两个最低分，英语平均分
1 Console.Write("输入班级人数："); 2 int n = int.Parse(Console.ReadLine()); 3 double[,] a = new double[n, 3]; 4 for (int i = 0; i < n; i++) 5 { 6 Console.Write("输入第{0}个人的语文成绩：", i + 1); 7 a[i, 0] = double.Parse(Console.ReadLine()); 8 Console.Write("输入第{0}个人的数学成绩：", i + 1); 9 a[i, 1] = double.Parse(Console.ReadLine());10 Console.Write("输入第{0}个人的英语成绩：", i + 1);11 a[i, 2] = double.Parse(Console.ReadLine());12 }13 Console.WriteLine("输入完毕！");14 for (int i = 0; i < n; i++)15 {16 for (int j = 0; j < 3; j++)17 {18 Console.Write(a[i, j] + "\t");19 }20 Console.WriteLine();21 }22 double sum = 0;23 for (int i = 0; i < n - 1; i++)24 {25 for (int j = i + 1; j < n; j++)26 {27 if (a[i, 0] < a[j, 0])28 {29 double t = a[i, 0];30 a[i, 0] = a[j, 0];31 a[j, 0] = t;32 }33 if (a[i, 1] > a[j, 1])34 {35 double t = a[i, 1];36 a[i, 1] = a[j, 1];37 a[j, 1] = t;38 }39 }40 sum += a[i, 2];41 }42 Console.WriteLine("语文两个最高分为{0},{1};数学两个最低分为{2},{3};英语平均分为{4}", a[0, 0], a[0, 1], a[1, 0], a[1, 1], sum / n); 
//打印“马”这个字
1 string[,] a = new string[,]{ 2 { " ","■","■","■","■"," ",""}, 3 { " "," ","■"," ","■","",""}, 4 { " "," ","■"," ","■","",""}, 5 { " "," ","■","■","■","■","■"}, 6 { " "," "," "," "," "," ","■"}, 7 { "■","■","■","■","■","■","■"}, 8 { " "," "," "," "," "," ","■"}, 9 { " "," "," "," "," ","■","■"},10 };11 for (int i = 0; i < 8; i++)12 {13 for (int j = 0; j < 7; j++)14 {15 Console.Write(a[i, j]);16 }17 Console.WriteLine();18 } 
//一维数组是一条线，二维数组是一个面（表格）
//三维数组是一个立体（教学楼） //int[,,]a=new int[,,];//split() 以***进行分割
//分割出来的内容放置在string类型中，不需要给数组定义长度Console.Write("请输入姓名,年龄,工作单位："); string s = Console.ReadLine(); string[] a = s.Split(','); foreach (string aa in a) { Console.WriteLine(aa); } 
//春眠不觉晓，处处闻啼鸟。夜来风雨声，花落知道多少。替换文字
1 string a = "春眠不觉晓，处处闻啼鸟。夜来风雨声，花落知道多少。";2 a = a.Replace("处", "这儿");3 Console.WriteLine(a); 
1 string[,] a = new string[4, 6] 2 { 3 { "春","眠","不","觉","晓","，"}, 4 { "处","处","闻","啼","鸟","。"}, 5 { "夜","来","风","雨","声","，"}, 6 { "花","落","知","多","少","。"} 7 }; 8 for (int i = 0; i < 4; i++) 9 {10 for (int j = 0; j < 6; j++)11 {12 if (a[i, j] == "处")13 {14 a[i, j] = "这儿";15 }16 Console.Write(a[i, j]);17 }18 Console.WriteLine();19 } 