C#（一维数组）

定义数组 int[] 变量名 = new int [n];

数组初始化

int[] myArray = new int[] {1, 3, 5, 7, 9};

//输入班级人数
//输入每个人的分数
//求总分、平均分、两个最高分，两个最低分

Console.Write("请输入班级的人数");
int n = int.Parse(Console.ReadLine());
double[] b = new double[n];
double fen = ;
for (int i = ; i < n; i++)
{
Console.Write("请输入{0}的分数：", i + );
b[i] = double.Parse(Console.ReadLine());
fen += b[i];
}
Console.Write(fen);
Console.Write(fen/n);

Console.ReadLine();

练习1：双色球抽奖

int[] red = new int[];
Random ran = new Random(); //初始化
for (int i = ; i <; i++)
{
bool b = true;
int a = ran.Next(,);
for (int j = ; j < i; j++)
{
if (a == red[j])
{
b = false;
i--;
j = ;
}
}
if (b == true)
{
red[i] = a;
}
}
for (int i = ; i <; i++)
{
for (int j = i; j <; j++)
{
if (red[i] > red[j+])  //冒泡排序
{
int zhong = red[i];
red[i] = red[j+ ];
red[j+] = zhong;
}
}
}
int s = ran.Next();
for (int i = ; i < ; i++) //滚动显示
{
Console.Clear();//清屏
int a = ran.Next(,);
int b = ran.Next(,);
int c = ran.Next(,);
int d = ran.Next(,);
int e = ran.Next(,);
int f = ran.Next(,);
int g = ran.Next(,);
Console.WriteLine("中奖号码："+a + "\0" + b + "\0" + c + "\0" + d + "\0" + e + "\0" + f + "\0"+g);
System.Threading.Thread.Sleep();//暂停100毫秒，0.1秒
}

////作弊代码

Console.Clear();
Console.WriteLine("中奖号码：" + red[] + "\0" + red[] + "\0" + red[] + "\0" +red[] + "\0" + red[] + "\0" +red[] + "\0" + s);
Console.ReadLine();

练习2.   随机出现一个四位的验证码，打印出来
比照打出来，验证输入的验证码是否有误
验证码不区分大小写

Random ran = new Random();
string[] ss = new string[] { "", "", "", "", "", "", "", "", "", "", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z" };
string[] s = new string[];
for (int i = ; i < ; i++)
{
int a = ran.Next(, );
s[i] = ss[a];
}
string b = s[] + s[] + s[] + s[];

Console.WriteLine("验证码：" + b);
Console.Write("请输入验证码：");
string shu = Console.ReadLine();
if (shu.ToLower() == b.ToLower())
{
Console.WriteLine("输入正确！");
}
else
{
Console.WriteLine("错误！");
}

Console.ReadLine();