Need help to print the following pattern using C language

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1       6       10      13      15
2       7       11      14
3       8       12
4       9
5

This is how the output should look like

What I have tried:

I tried to find a specific pattern that follows in the rows and columns and found:
1. Number in the successive rows increase by 1
2. Number in the columns increase as (+5,+4,+3,+2......)

Posted 30-Jul-21 18:51pm

Atul Shreewastav

Updated 30-Jul-21 19:30pm

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OriginalGriff · Accepted Answer · 2021-07-30T19:30:00

Think of it this way: assuming you have to print this in a console, then you need to print it as complete rows (or it gets complex: you need to create a 2D array, fill it, and then print that. While that is actually pretty simple to to, if you haven't reached that part of your course yet it's probably beyond you for the moment).

So look at the data differently:

1      Col1+nCol1   Col2+nCol2   Col3+nCol3   Col4+nCol4
2      Col1+nCol1   Col2+nCol2   Col3+nCol3
3      Col1+nCol1   Col2+nCol2
4      Col1+nCol1   
5

Where "nColx" is "the number of rows in Column x", and "Colx" is "the value in Column x of this row".
So that works out to:

1    1+5   1+5+4   1+5+4+3  1+5+4+3+2
2    2+5   2+5+4   2+5+4+3
3    3+5   3+5+4
4    4+5
5

Now, that's got a readable pattern that is easy to automate for any number of rows!