C# string[,]与string[][]的区别

对于这两者的区别:

1.入门:string[,]可读可写,而string[][]与string[]相同,不可对第二位进行写操作

  

static void Main(string[] args)
        {

            //声明变量
            string[] str1 = new string[10];
            string[,] str2 = new string[10, 10];
            string[][] str3=new string[10][];
            //string[][] str3 = new string[10][10];  //编译报错:无效的秩说明符: 应为“,”或“]”

            //赋值
            for (int i = 0; i < 10; i++)
            {
                for (int j = 0; j < 10; j++)
                {
                    str1[i] = i.ToString("00") + j.ToString("00");
                    //str1[i][j] = i.ToString("00") + j.ToString("00");   //编译不过:无法对属性或索引器“string.this[int]”赋值 -- 它是只读的
                    str2[i, j] = i.ToString() + j.ToString();
                }
            }

            //输出str[][]
            System.Console.WriteLine("this is str[]:");
            for (int i = 0; i < 10; i++)
            {
                System.Console.Write(str1[i]+" ");
            }
            System.Console.WriteLine();
            System.Console.WriteLine("and:");
            for (int i = 0; i < 10; i++)
            {
                for (int j = 0; j < 4; j++)
                {
                    System.Console.Write(str1[i][j] + " ");
                }
                System.Console.WriteLine();
            }

            //输出str[,]
            System.Console.WriteLine();
            System.Console.WriteLine("this is str[,]:");
            for (int i = 0; i < 10; i++)
            {
                for (int j = 0; j < 10; j++)
                {
                    System.Console.Write(str2[i,j]+" ");
                }
                System.Console.WriteLine();
            }

            System.Console.ReadKey();
        }

 

2.进阶:当然是在内存中占的内存不同;

  稍后善后

posted on 2015-08-18 21:28  是知也  阅读(2001)  评论(0编辑  收藏  举报

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