Putting a null in the middle of random number

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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();
       }

Posted 17-Jul-17 23:35pm

Member 13284925

Updated 18-Jul-17 7:45am

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Comments

BillWoodruff 18-Jul-17 17:23pm

Why don't you generate two random indexes, one for the row, one for the column, and, in your print loop, test for those indexes being current and insert "null" there ?

RickZeeland 19-Jul-17 8:55am

Did you downvote my last solution ? if so I would like to know why.

3 solutions

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RickZeeland · Answer 1 · 2017-07-18T07:45:00

Here is a more efficient solution:

C#

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();

Patrice T · Answer 2 · 2017-07-18T00:07:00

Solution 2

Be careful

C#

} while (number3.Contains(range4));

Posted 18-Jul-17 0:07am

Patrice T

Updated 18-Jul-17 0:48am

v2

RickZeeland · Answer 3 · 2017-07-18T00:02:00

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

C#

string range3string;

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

To be more specific:

C#

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();
        }

Putting a null in the middle of random number

3 solutions

Solution 3

Solution 2

Solution 1

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