Having Trouble with this For Loop

Question

This is quite hard to articulate, but this is what I'm Attempting to do: alt text So I may end up with an array of indexes as:

Currently what I've been trying to do is take some givens: i = current row; (1,2,3...7) r = Square Root of Total Indexes -1 (total indexes will always be a square of 2, a la 64,128, 256...)

i=1, so i+r Once. i=2, i+r Twice. i=3, i+r Thrice.

and so on and so forth...

Answer 1

Well the difference between the next digit in the sequence is always 7, by induction. And you always continue adding 7 to get to the next digit until you've counted n numbers (where n is the row number). Then you reset the counter and start from the digit n - 1. And you repeat. This is the pattern until row number = 8.

So here's the full algorithm:

 var numbers = new List<int>();
 
 int rowNum = 1;
 int counter = 0;
 
 // First loop
 while (rowNum <= 8)
 {
     int num = rowNum - 1;
     numbers.Add(num);
 
     while (counter < rowNum - 1)
     {
         num += 7;
         numbers.Add(num);
 
         counter++;
     }
 
     counter = 0;
     rowNum++;
 }
 
 int offset = 1;
 
 // Second loop
 while (rowNum < 16)
 {
     int num = rowNum - 1 + 7 * offset;
     numbers.Add(num);
 
     while (counter < rowNum - offset - 2)
     {
         num += 7;
         numbers.Add(num);
 
         counter++;
     }
 
     counter = offset;
     rowNum++;
     offset++;
 }

@FaffyWaffles

Having Trouble with this For Loop

1 Reply

Your answer

Follow this Question

Related Questions