class Program
{
static void Main(string[] args)
{
//第一种声明方式;
int[,] arr = new int[2, 3];//初始化声明2行3列二位数组的长度;
//第二种声明方式;
int[,] arr2 = new int[2, 3] { { 1, 2, 3 }, { 4, 5, 6 } };//声明数组长度并初始化它具体的值;
//第三种声明方式;
int[,] arr3 = {
{ 1, 2, 3 },
{ 4, 5, 6 },
{ 7, 8, 9 }
};
//声明二位数组并初始化直接赋值;不用声明具体长度以及实例化,行数可以变;列数不变;列数变,每列都要变;
Console.WriteLine(arr3.Length);//长度是值数组的每一个元素之和=行*列;
Console.WriteLine(arr3[2, 1]);//二位数相应下标从0号位开始;相关取法和一维数组一样;注意写法arr[0,2];
arr3[0, 2] = 888;//可以重新赋值;
Console.WriteLine(arr3[0, 2]);
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
Console.Write(arr3[i, j] + " ");
}
Console.Write("\n");
}
//练
const int Line = 4;//行数
const int List = 5;//列数
int[,] arr = new int[Line, List] { { 1, 2, 3, 0, 8 }, { 4, 5, 6, 0, 8 }, { 7, 8, 9, 0, 8 }, { 1, 2, 3, 0, 8 }, };
for (int i = 0; i < Line; i++)
{
for (int j = 0; j < List; j++)
{
Console.Write(arr[i, j] + " ");
}
Console.WriteLine();
}
//练
int[,] arr1 = new int[2, 3] { { 1, 2, 3 }, { 4, 5, 6 } };
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 3; j++)
{
Console.Write(arr1[i, j] + " ");
}
Console.WriteLine();
}
//练 遍历数组 简易方法//arr.getlength();
int[,] arr = new int[2, 3] { { 1, 2, 3 }, { 4, 5, 6 } };
for(int i=0;i Arr[i,j])//判断最小值
{
arrMin = Arr[i,j];
}
}
}
Console.WriteLine("最大值为{0}\n最小值为{1}\n", arrMax, arrMin);
//2.2:对这个二维数组进行从小到到的排序显示,如这样{{1,2,3},{4,5,6},{7,8,9}};
//------------二维数组直接排序------------------
for (int i = 0; i < Arr.GetLength(0); i++)
{
for (int j = 0; j < Arr.GetLength(1); j++)
{
for (int k = 0; k < Arr.GetLength(0); k++)
{
for (int q = 0; q < Arr.GetLength(1); q++)
{
if (Arr[i, j] < Arr[k, q])
{
int temp = Arr[i, j];
Arr[i, j] = Arr[k, q];
Arr[k, q] = temp;
}
}
}
}
}
//------------二维数组变成一维数组;再排序转换成二维数组------------------
int[] arrPaixu=new int[Arr.Length];
int js_1 = 0;
for (int i = 0; i < Arr.GetLength(0); i++)
{
for (int j = 0; j < Arr.GetLength(1); j++)
{
arrPaixu[js_1] = Arr[i, j];
js_1++;
}
}
for (int i = 0; i < arrPaixu.Length; i++)
{
for (int j = 0; j < arrPaixu.Length; j++)
{
if (arrPaixu[i] < arrPaixu[j])
{
int temp = arrPaixu[i];
arrPaixu[i] = arrPaixu[j];
arrPaixu[j] = temp;
}
}
}
js_1 = 0;
for (int i = 0; i < Arr.GetLength(0); i++)
{
for (int j = 0; j < Arr.GetLength(1); j++)
{
Arr[i, j]=arrPaixu[js_1];
js_1++;
}
}
int js1 = 0;
foreach (int arr22 in Arr)
{
Console.Write(arr22 + " ");
js1++;
if (js1 % 4 == 0)
{
Console.WriteLine();
}
}
Console.ReadKey();
}
}