Question

C# 中foreach 怎么遍历二维数组

Answer 1

int[,] a = new int[, ] { {1,2,3},{4,5,6},{7,8,9}};

int[][] c = new int[3][] {
new int[2] {1,2},
new int[3] {3,4,5},
new int[4] {6,7,8,9}};

foreach (int b in a)
{
Console.WriteLine(b);
}

foreach (int[] b in c)
{
foreach (int d in b)
Console.WriteLine(d);
}

Answer 2

不用嵌套foreach
看代码：
int[,] numbers2D = new int[3, 2] { { 9, 99 }, { 3, 33 }, { 5, 55 } };
// Or use the short form:
// int[,] numbers2D = { { 9, 99 }, { 3, 33 }, { 5, 55 } };

foreach (int i in numbers2D)
{
System.Console.Write("{0} ", i);
}
// Output: 9 99 3 33 5 55

Answer 3

和普通的一维数组一样，会依次遍历每个元素

Answer 4

直接遍历啊，一行接一行

Answer 5

foreach 嵌套foreach