Code Golf - p day
- by gnibbler
The Challenge
The shortest code by character count to display a representation of a circle of radius R using the *character, followed by an approximation of p.
Input is a single number, R.
Since most computers seem to have almost 2:1 ratio you should only output lines where y is odd.
The approximation of p is given by dividing twice the number of * characters by R². The approximation should be correct to at least 6 significant digits. Leading or trailing zeros are permitted, so for example any of 3, 3.000000, 003 is accepted for the inputs of 2 and 4.
Code count includes input/output (i.e., full program).
Test Cases
Input
2
Output
***
***
3.0
Input
4
Output
*****
*******
*******
*****
3.0
Input
8
Output
*******
*************
***************
***************
***************
***************
*************
*******
3.125
Input
10
Output
*********
***************
*****************
*******************
*******************
*******************
*******************
*****************
***************
*********
3.16
