为什么在C＃中使用二维数组时出现错误？

Question

在C＃中对二维数组执行任何任务时，出现错误“ CS0022：索引数1' inside [], expected 2'错误。”

static void Main(string[] args) 
{      
    int sum = 0, max = 0;
    int [,] ar = new int[6,6]  {{ -1,-1, 0,-9,-2,-2},
                                { -2,-1,-6,-8,-2,-5},
                                { -1,-1,-1,-2,-3,-4},
                                { -1,-9,-2,-4,-4,-5},
                                { -7,-3,-3,-2,-9,-9},
                                { -1,-3,-1,-2,-4,-5}};
    for(int i = 0 ; i<4 ; i++)
    {
        for(int j = 0 ; j<4 ; j++)
        {
            sum =( 
            ar[ i ][ j ] + 
            ar[ i ][j+1] + 
            ar[ i ][j+2] + 
            ar[i+1][j+1] + 
            ar[i+2][ j ] + 
            ar[i+2][j+1] + 
            ar[i+2][j+2]  );                
            if(sum > max )
            {
                max = sum;
            }
            else
            {}   
        }              
    }                 
    Console.WriteLine(max);                        
}

它应该打印出最大的沙漏总和，应该为-6，但是会出现错误。

Answer 1

对数组建立索引时，请使用[n，m]而不是[n] [m]。 您还需要在主目录中添加“ public”。 这是正确的代码：

    public static void Main(string[] args) 
    {      
        int sum = 0, max = 0;
        int [,] ar = new int[6,6]  {{ -1,-1, 0,-9,-2,-2},
                                    { -2,-1,-6,-8,-2,-5},
                                    { -1,-1,-1,-2,-3,-4},
                                    { -1,-9,-2,-4,-4,-5},
                                    { -7,-3,-3,-2,-9,-9},
                                    { -1,-3,-1,-2,-4,-5}};
        for(int i = 0 ; i<4 ; i++)
        {
            for(int j = 0 ; j<4 ; j++)
            {
                sum =( 
                ar[ i , j ] + 
                ar[ i ,j+1] + 
                ar[ i ,j+2] + 
                ar[i+1,j+1] + 
                ar[i+2, j ] + 
                ar[i+2,j+1] + 
                ar[i+2,j+2]  );                
                if(sum > max )
                {
                    max = sum;
                }
                else
                {}   
            }              
        }                 


  Console.WriteLine(max);                        
}