数组
数组，就是相同数据类型的元素按一定顺序排列的集合，就是把有限个类型相同的变量用一个名字命名，然后用编号区分他们的变量的集合，这个名字称为数组名，编号称为下标。
一维数组
数组初始化，创建数组，数组长度为5
数组中元素的索引是从0开始的
int [] array=new int[5];
array[0] = 1;
array[1] = 2;
array[2] = 3;
array[3] = 4;
array[4] = 5;
//将2号索引位置改成7
array[2] = 7;
//想查看3号索引位置是什么值
Console.WriteLine(array[3]);
//把4号索引位置的值赋值给a
int a = array[4];
//将1号索引位置的值变成从控制台输入
array[1] = int.Parse(Console.ReadLine());
Console.ReadLine();
//直接赋值的数组
int[] array1 = new int[] {1,2,3,4,5 };
例： 存放5个人的人名
string [] name =new string[5];
for (int i = 1; i <= 5; i++)
{
Console.Write("请输入第"+i+"个人的名字：");
name[i-1] = Console.ReadLine();
}
//查看第三个人的姓名
//Console.WriteLine(name[2]);
//将每个人的姓名都打印出来
for (int i = 0; i < 5; i++)
{
Console.WriteLine(name[i]);
}
Console.ReadLine();
例：输入班级人数，输入每个人的分数，求平均分
Console.Write("请输入班级人数：");
int a = int.Parse(Console.ReadLine());
double[] fen = new double[a];
for (int i = 0; i < a; i++)
{
Console.Write("请输入第" + (i + 1) + "个人的分数：");
fen[i] = double.Parse(Console.ReadLine());
}
double sum = 0;
for (int i = 0; i < a; i++)
{
sum += fen[i];
}
Console.WriteLine("平均分是：" + (sum / a));
Console.ReadLine();
二维数组
int [,] shuzu = new int[3,4];
//3 表示有3个一维数组
//4 表示每一个一维数组有4个元素
//给第一个一维数组的2号索引赋值
shuzu[0, 2] = 3;
//直接赋值
int[,] shuzu1 = new int[,] {
{1,2,3,4},
{2,3,4,5},
{3,4,5,6}
};
例： 输入班级人数，存放每个人的语、数、英成绩进入数组
Console.Write("请输入班级人数：");
int a = int.Parse(Console.ReadLine());
double [,] score = new double [a,3];
for (int i = 0; i < a; i++)
{
Console.Write("请输入第{0}个人的语文成绩：",(i+1));
score[i, 0] = double.Parse(Console.ReadLine());
Console.Write("请输入第{0}个人的数学成绩：", (i + 1));
score[i, 1] = double.Parse(Console.ReadLine());
Console.Write("请输入第{0}个人的英语成绩：", (i + 1));
score[i, 2] = double.Parse(Console.ReadLine());
}
//求每个人的总分
double [] zong = new double[a];
for (int i = 0; i < a; i++)
{
zong[i] = score[i, 0] + score[i, 1] + score[i, 2];
Console.WriteLine("第{0}个人的总分是：{1}",(i+1),zong[i]);
}
//求语文总分 //求数学平均分
double yuzong = 0;
double shuzong = 0;
for (int i = 0; i < a; i++)
{
yuzong += score[i, 0];
shuzong += score[i, 1];
}
Console.WriteLine("语文总分是："+yuzong);
Console.WriteLine("数学平均分是："+shuzong/a);
Console.ReadLine();
例：根据二维数组，打印一个“王”
string [,] wang = new string[,]
{
{" ","■","■","■","■","■",""},
{" "," "," ","■","","",""},
{" "," "," ","■","","",""},
{" "," ","■","■","■","",""},
{" "," "," ","■","","",""},
{" "," "," ","■","","",""},
{"■","■","■","■","■","■","■"},
};
//打印出王
for (int i = 0; i < 7; i++)
{
for (int j = 0; j < 7; j++)
{
Console.Write(wang[i,j]);
}
Console.WriteLine();
}
Console.ReadLine();
多维数组：
数组可以具有多个维度。例如：
int[,,] myArray = new int[2,4,2] {{1,2},{3,4},{5,6},{7,8}} , {{9,10},{11,12},{13,14},{15,16}};
//2 表示有2个二维数组
//4 表示 每个二位数组里面有4个一维数组
//2 表示 每一个一维数组里面有几个元素
冒泡排序
数组当中不自带排序的方法，所以需进行冒泡排序
拿第一个值和第二个值比，若第一个数小于第二个数进行调换，然后第一个值再和第三个值比较，若小于再调换
例：33 22 11 66 44
33 22 11 66 44
33 22 11 66 44
66 22 11 33 44
66 33 11 22 44
66 44 11 22 33
66 44 22 11 33
66 44 33 11 22
66 44 33 22 11
例：从控制台输入班级人数，每个人的年龄放入数组，
将所有人的年龄求总和，冒泡排序，求年龄最大
Console.Write("请输入班级人数：");
int a = int.Parse(Console.ReadLine());
int[] age = new int[a];
//int sum = 0;
for (int i = 0; i < a; i++)
{
Console.Write("请输入第{0}个人的年龄：", (i + 1));
age[i] = int.Parse(Console.ReadLine());
//sum += age[i];
}
//Console.WriteLine("年龄总和是：" + sum);
//冒泡排序
for (int i = 0; i < a; i++)
{
for (int j = i; j < a - 1; j++)
{
if (age[i] < age[j + 1])
{
int zhong = age[i];
age[i] = age[j + 1];
age[j + 1] = zhong;
}
}
}
for (int i = 0; i < a; i++)
{
Console.WriteLine(age[i]);
}
Console.ReadLine();
例： 随机生成10个100以内的不重复的整数放入数组，打印
然后排序，要求，从小到大
int[] suiji = new int[10];
Random ran = new Random();
for (int i = 0; i < 10; i++)
{
bool b = true;
int a = ran.Next(11);
for (int j = 0; j < i; j++)
{
if (a == suiji[j])
{
b = false;
i--;
j = 100;
}
}
if (b)
{
suiji[i] = a;
}
}
//打印每一个数
for (int i = 0; i < 10; i++)
{
Console.WriteLine(suiji[i]);
}
Console.WriteLine();
//冒泡排序
for (int i = 0; i < 10; i++)
{
for (int j = i; j < 9; j++)
{
if (suiji[i] > suiji[j + 1])
{
int zhong = suiji[i];
suiji[i] = suiji[j + 1];
suiji[j + 1] = zhong;
}
}
}
//打印每一个数
for (int i = 0; i < 10; i++)
{
Console.WriteLine(suiji[i]);
}
Console.ReadLine();
例： // 双色球随机出号码
// 6个红色球，1个蓝色球
// 红色球号码不重复，从小到大排列，打印的时候拼上蓝色球
int[] suiji = new int[6];
Random ran = new Random();
int x = ran.Next(1, 17);
for (int i = 0; i < 6; i++)
{
bool b = true;
int a = ran.Next(1, 33);
for (int j = 0; j < i; j++)
{
if (a == suiji[j])
{
b = false;
i--;
}
}
if (b)
{
suiji[i] = a;
}
}
for (int i = 0; i < 6; i++)
{
for (int j = i; j < 5; j++)
{
if (suiji[i] > suiji[j+1])
{
int zhong = suiji[i];
suiji[i] = suiji[j+1];
suiji[j+1] = zhong;
}
}
}
for (int i = 0; i < 6; i++)
{
Console.Write(suiji[i] + "\t");
}
Console.Write(x);
Console.ReadLine();
//输入手机号码，做滚动抽奖
Console.Write("请输入手机号码");
int a = int.Parse(Console.ReadLine());
string[] jiang = new string[a];
for (int i = 0; i < a; i++)
{
Console.Write("输入第{0}个人的手机号", (i + 1));
jiang[i] = Console.ReadLine();
}
Random ran = new Random();
Console.Write("所有号码输入完毕");
for (int i = 0; i < 30; i++)
{
Console.Clear();
int aa = ran.Next(a);
Console.WriteLine("号码是" + jiang[aa]);
System.Threading.Thread.Sleep(100);
}
Console.ReadLine();
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