How can I change this to a pyramid?

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1.00/5 (1 vote)

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I need to change the output of this while loop code into a pyramid of asterisks. However, I am confused because I made a Christmas tree-like pyramid.

____*
___* *
__* * *
_* * * *
* * * * *

p.s. kindly treat underscores as spaces

What I have tried:

i3 = 0;
j3 = 0;
k3 = 0;
while i3<=n
  while k3<=(n-i3-1)
    fprintf(" ")
    k3 = k3 + 1;
  endwhile
  k3 = 0;
  while j3<(2*i3-1)
    fprintf("*")
    j3 = j3+1;
  endwhile
  j3 = 0;
  i3 = i3+1;
  fprintf("\n")
  endwhile

Posted 22-Jun-22 23:57pm

pollie 2022

Updated 23-Jun-22 3:25am

v2

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Richard MacCutchan 23-Jun-22 6:21am

A Pascal Triangle consists of numbers, not asterisks.

CPallini 23-Jun-22 7:30am

Richard is correct. Please define a 'Pascal pyramid of asterisks'.

pollie 2022 23-Jun-22 7:50am

I'm sorry. This kind of pattern is what I meant. I edited now my question.
____*
___* *
__* * *
_* * * *
* * * * *

p.s. the underscores are not included, i just used it to adjust the pyramid

3 solutions

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CPallini · Answer 1 · 2022-06-23T03:25:00

Solution 3

Do you mean this?

matlab

rows = 5;
r = 0;
while r < 5;
  x = -rows;
  while x <= rows
    if ( (x >= -r) && (x<= r) && mod(r,2) == mod(x,2))
      fprintf("*")
    else
      fprintf(" ")
    endif
    x = x + 1;
  endwhile
    fprintf("\n")
    r = r + 1;
endwhile

Posted 23-Jun-22 3:25am

CPallini

Comments

Patrice T 25-Jun-22 14:10pm

+5

Richard MacCutchan · Answer 2 · 2022-06-23T02:47:00

Solution 1

This is just a matter of counting, as you can see from your example picture. The final line is five stars, the previous line is one space and four stars, etc. So from the pattern it should be easy to calculate how many of each character you need to print on each line.

Posted 23-Jun-22 2:47am

Richard MacCutchan

Patrice T · Answer 3 · 2022-06-23T03:18:00

Solution 2

Quote:
How can I change this to a pyramid?

Look carefully at your pyramid:

____*
___*_*
__*_*_*
_*_*_*_*
*_*_*_*_*

There is more spaces than what you seems to think.

Posted 23-Jun-22 3:18am

Patrice T