1-9随机赋值给一个9位数组

嘿嘿，这是问别人得出来的。

方法1：先按顺序赋值，然后再排序。

int[] number = new int[9]; for (int i = 0; i < number.Length; i++) { number[i] = i + 1; } Random rnd = new Random(Environment.TickCount); Array.Sort(number, delegate(int a,int b) { return rnd.Next(); }); foreach (var item in number) { Console.WriteLine(item); }

上面这个虽然打乱了顺序，但每次运行时得出的结果一样。

int[] number = new int[9]; for (int i = 0; i < number.Length; i++) { number[i] = i + 1; } Random rnd = new Random(Environment.TickCount); number = number.OrderBy(n=>rnd.Next()).ToArray(); foreach (var item in number) { Console.WriteLine(item); }

利用LINQ来更行 排序

Random rnd = new Random(Environment.TickCount); int[] number = new int[9]; int[] keys = new int[9]; for (int i = 0; i < number.Length; i++) { number[i] = i + 1; keys[i] = rnd.Next(); } Array.Sort(keys, number); //number = number.OrderBy(n => rnd.Next()).ToArray(); foreach (var item in number) { Console.WriteLine(item); }

利用种子排序。

方法2：

利用random.next(1,10)随机的产生1-9的数字，其间通过一个函数判断是否重复，若重复则再用random.next(1,10)产生新值，直到不再重复为止。

int[] number=new int[9]; Random rand = new Random(); //判断该数是否唯一 public bool IsRepeatNum(int num) { foreach(int n in number ) { if (num == n) return true; } return false; } //输出方法。 for (int i = 0; i < 9; i++) { int r; do { r = rand.Next(1, 10); } while (IsRepeatNum(r)); number[i] = r; Console.WriteLine(number[i]); }

别人的：

class GetNumWhereNotRepeat { private int[]nArr=new int[9]; private Random _r=new Random(); public int[] NumArr { get { return nArr; } } /// <summary> /// 把得到到号码付值给nArr中的每个元素 /// </summary> public void FillNotRepeatNum() { for(int i=0;i<nArr.Length;i++) { nArr[i]=GetNumNotRepeat(); } } /// <summary> /// 判断是否重复 /// </summary> /// <param name="num"></param> /// <returns></returns> public bool IsRepeat(int num) { foreach(int num1 in nArr) { if(num1==num) { return true; } } return false; } /// <summary> /// 得到不重复的号码 /// </summary> /// <returns></returns> public int GetNumNotRepeat() { int num; do { num=_r.Next(1,10); }while(IsRepeat(num)); return num; } } ------------------------------------------------ class Program { static void Main(string[] args) { GetNumWhereNotRepeat get = new GetNumWhereNotRepeat(); get.FillNotRepeatNum();//填充数据 Console.Write("不重复的号码："); for (int i = 0; i < 9; i++) { Console.Write("{0} ", get.NumArr[i]);//依次写出数据 } } }

 

 

namespace Test { class Program { static void Main(string[] args) { int[] Test = new int[100]; Program p = new Program(); Test = p.getNotRepeatNum(Test); foreach (int t in Test) { Console.Write(t + " "); } Console.WriteLine(); Console.Read(); } Random rand = new Random(); //判断一个数组里是否和指定的值相等 public bool IsRepeatNum(int num, int[] numbers) { foreach (int n in numbers) { if (num == n) return true; } return false; } //获取一个没有重复的数组 public int[] getNotRepeatNum(int[] number) { int r; for (int i = 0; i < number.Length; i++) { do { r = rand.Next(1, number.Length + 1); } while (IsRepeatNum(r, number)); number[i] = r; } return number; } } }