如何在C＃中查找数组的排名

Array.Rank属性用于获取Array的排名。等级是数组的维数。例如，一维数组返回1，二维数组返回2，依此类推。

句法：

public int Rank { get; }

属性值：返回System.Int32类型的Array的等级(维数)。

下面的程序说明了上面讨论的属性的用法：

范例1：

// C# program to illustrate the
// Array.Rank Property
using System;
namespace geeksforgeeks {
  
class GFG {
  
    // Main Method
    public static void Main()
    {
  
        // declares a 1D Array of string.
        string[] weekDays;
  
        // allocating memory for days.
        weekDays = new string[] {"Sun", "Mon", "Tue", "Wed",
                                      "Thu", "Fri", "Sat" };
  
        // using Rank Property
        Console.WriteLine("Dimension of weekDays array: " 
                                       + weekDays.Rank);
    }
}
}

输出：

Dimension of weekDays array: 1

范例2：

// C# program to illustrate the
// Array.Rank Property
using System;
namespace geeksforgeeks {
  
class GFG {
  
    // Main Method
    public static void Main()
    {
  
        // declaring an 2-D array
        int[, ] arr2d = new int[4, 2];
  
        // declaring an 3-D array
        int[,, ] arr3d = new int[4, 2, 3];
  
        // declaring an jagged array
        int[][] jdarr = new int[2][];
  
        // using Rank Property
        Console.WriteLine("Dimension of arr2d array: " 
                                        + arr2d.Rank);
  
        Console.WriteLine("Dimension of arr3d array: " 
                                        + arr3d.Rank);
  
        // for the jagged array it 
        // will always return 1
        Console.WriteLine("Dimension of jdarr array: " 
                                        + jdarr.Rank);
    }
}
}

输出：

Dimension of arr2d array: 2
Dimension of arr3d array: 3
Dimension of jdarr array: 1

笔记：

• 锯齿状数组(数组的数组)是一维数组，因此其Rank属性的值为1。
• 检索此属性的值是O(1)操作。

参考：

• https://docs.microsoft.com/zh-cn/dotnet/api/system.array.rank?view=netframework-4.7.2