二维数组
/*
string s = "holle world";
string[] a = s.Split(' ');//拆分符，里面可以加很多条件，用单引号阔起来
//Console.WriteLine(a[0]);
//Console.WriteLine(a[1]);
for (int i = 0; i < a.Length; i++)
{
Console.WriteLine(a[i]);
}
*/
//数组保证有序 二分法找数
/*
int[] a = new int[] {1,2,3,4,5,7,9,10};
Console.Write("请输入你要找的数：");
int m = Convert.ToInt32(Console .ReadLine());
int x = 0, y = a.Length - 1, zj;
while(y>=x)
{
zj = (x + y) / 2;
if(m==a[zj])
{
Console.WriteLine("第{0}个数是你要找的数",zj);
break;
}
if(m>a[zj])
{
x = zj + 1;
}
if (m < a[zj])
{
y = zj - 1;
}
}
*/
//二维数组分标准a[2,3]和伪二维数组a[2][3]
//标准的格式
/*
int[,] a = new int[2, 3]{{，，}，{，，}};
for（行）
{
for(列)
{
Console .Write (a[m,n]+"\t");
}
Console .Write ("\n");
}
*/
//伪二维的格式
/*
int[][] a=new int[2][];
int[] a1 = new int[2];
int[] a2 = new int[3];
a[0] = a1;
a[1] = a2;
for (int i = 0; i < 2;i++ )
{
for (int n = 0; n < a[i].Length; n++)
{
}
}
*/
//输入和输出的实例 成绩表
/*
int[,] a = new int[3, 5] ;
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 5; j++)
{
Console.Write("请输入第{0}行第{1}列的值：",i,j);
a[i, j] = Convert.ToInt32(Console .ReadLine ());
}
}
Console.WriteLine("刚才输入的内容是：");
Console.WriteLine("学号\t语文\t数学\t英语\t理综");
for(int i=0;i<3;i++)
{
for (int j = 0; j < 5;j++ )
{
Console.Write(a[i, j] + "\t");
}
Console .Write ("\n");
}
*/
//学生成绩表排名
/*
int[,] a = new int[3, 6] ;
for (int i = 0; i < 3; i++)
{
Console.Write("请输入第{0}位学生的学号：", i + 1);
a[i, 0] = Convert.ToInt32(Console.ReadLine());
Console.Write("请输入第{0}位学生的语文成绩：", i +1);
a[i,1]=Convert .ToInt32 (Console .ReadLine ());
Console.Write("请输入第{0}位学生的数学成绩：", i +1);
a[i, 2] = Convert.ToInt32(Console.ReadLine());
Console.Write("请输入第{0}位学生的英语成绩：", i +1);
a[i, 3] = Convert.ToInt32(Console.ReadLine());
a[i, 4] = a[i, 1] + a[i, 2] + a[i, 3];
a[i, 5] = i + 1;
}
for (int i = 1; i < 3;i++ )
{
for (int j = 1; j < 4-i; j++)
{
if(a[j-1,4]<a[j,4] )
{
for (int m = 0; m < 5;m++ )
{
int n = a[j - 1, m];
a[j - 1, m] = a[j, m];
a[j, m] = n;
}
}
}
}
Console.WriteLine("学号\t语文\t数学\t英语\t总分\t排名");
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 6; j++)
{
Console.Write(a[i, j] + "\t");
}
Console.Write("\n");
}
*/
