在随机数的中间放置一个null [英] Putting a null in the middle of random number

问题描述

我有这个代码，显示5个不同范围的随机数。代码执行时显示这个



BINGO

1 11 30 35 45

5 15 25 38 50

3 20 22 31 52



现在我想在中间行放一个星号（*）或null。

这样的事情：

BINGO

1 11 30 35 45

5 15 NULL 38 50
3 20 22 31 52.

任何人都可以提供帮助吗？



我尝试了什么：

i have this code which displays random number of 5 different ranges. when code is executed it displays this

B I N G O
1 11 30 35 45
5 15 25 38 50
3 20 22 31 52

Now i want to put a star(*) or null in the middle row.
something like this:
B I N G O
1 11 30 35 45
5 15 NULL 38 50
3 20 22 31 52.
CAN ANYONE HELP?

What I have tried:

Random rand = new Random();
           HashSet<int> number1 = new HashSet<int>();
           HashSet<int> number2 = new HashSet<int>();
           HashSet<int> number3 = new HashSet<int>();
           HashSet<int> number4 = new HashSet<int>();
           HashSet<int> number5 = new HashSet<int>();
           int range1;
           int range2;
           int range3;
           int range4;
           int range5;
           Console.WriteLine("B  I   N   G   O");
           for (int i = 0; i <= 10; i++)
           {
               do
               {

                   range1 = rand.Next(0, 10);

               } while (number1.Contains(range1));
               number1.Add(range1);


               do
               {
                   range2 = rand.Next(11,21);
               } while (number2.Contains(range2));
               number2.Add(range2);

               do
               {
                   range3 = rand.Next(22,32);
               } while (number3.Contains(range3));

               number3.Add(range3);
               do
               {
                   range4 = rand.Next(33,43);
               } while (number3.Contains(range4));
               number4.Add(range4);

               do
               {
                   range5 = rand.Next(44, 54);
               } while (number5.Contains(range5));
               number5.Add(range5);

               Console.WriteLine("{0}  {1}  {2}  {3}  {4}",range1, range2,range3, range4, range5);
           }
           Console.ReadLine();
       }

推荐答案

这是一个更有效的解决方案：

Here is a more efficient solution:

Random rand = new Random();
List<int> list1 = new List<int> {0,1,2,3,4,5,6,7,8,9,10};
List<int> list2 = new List<int> {11,12,13,14,15,16,17,18,19,20,21};
List<int> list3 = new List<int> {22,23,24,25,26,27,28,29,30,31,32};
List<int> list4 = new List<int> {33,34,35,36,37,38,39,40,41,42,43};
List<int> list5 = new List<int> {44,45,46,47,48,49,50,51,52,53,54};

Console.WriteLine("B  I   N   G   O");

for (int i = 0; i <= 10; i++)
{
	string range3string;
	
	// Console.WriteLine("count = " + list1.Count);
	var r = rand.Next(0, list1.Count);
	int range1 = list1[r];
	list1.RemoveAt(r);
   
	r = rand.Next(0, list2.Count);
	int range2 = list2[r];
	list2.RemoveAt(r);
   
	r = rand.Next(0, list3.Count);
	int range3 = list3[r];
	list3.RemoveAt(r);
   
	r = rand.Next(0, list4.Count);
	int range4 = list4[r];
	list4.RemoveAt(r);
   
	r = rand.Next(0, list5.Count);
	int range5 = list5[r];
	list5.RemoveAt(r);
	
	if (i == 5)
		range3string = "NULL";
	else
		range3string = range3.ToString();

	Console.WriteLine("{0}  {1}  {2}  {3}  {4}",range1, range2, range3string, range4, range5);
}

Console.ReadLine();

小心

Be careful

} while (number3.Contains(range4));

您可以为range3使用字符串变量，例如range3string：

You could use a string variable for range3, e.g. range3string:

string range3string;

if (<your condition>)
  range3string = range3;
else
  range3string = "NULL";

更具体一点：

To be more specific:

Random rand = new Random();
            HashSet<int> number1 = new HashSet<int>();
            HashSet<int> number2 = new HashSet<int>();
            HashSet<int> number3 = new HashSet<int>();
            HashSet<int> number4 = new HashSet<int>();
            HashSet<int> number5 = new HashSet<int>();
            int range1;
            int range2;
            int range3;
            int range4;
            int range5;
            string range3string;

            Console.WriteLine("B  I   N   G   O");

            for (int i = 0; i <= 10; i++)
            {
                do
                {
                    
                    range1 = rand.Next(0, 10);
 
                } while (number1.Contains(range1));
                number1.Add(range1);
               
                do
                {
                    range2 = rand.Next(11,21);
                } while (number2.Contains(range2));
                number2.Add(range2);
 
                do
                {
                    range3 = rand.Next(22,32);
                } while (number3.Contains(range3));
                number3.Add(range3);

                do
                {
                    range4 = rand.Next(33,43);
                } while (number4.Contains(range4));
                number4.Add(range4);
 
                do
                {
                    range5 = rand.Next(44, 54);
                } while (number5.Contains(range5));
                number5.Add(range5);
 
                if (i == 5)
                  range3string = "NULL";
                else
                  range3string = range3.ToString();

                Console.WriteLine("{0}  {1}  {2}  {3}  {4}",range1, range2, range3string, range4, range5);
            }
            Console.ReadLine();
        }

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