Positive decimal integers with the digit 1 occurring exactly twice: Difference between revisions
Content added Content deleted
(→{{header|REXX}}: added the computer programming language REXX.) |
m (→{{header|REXX}}: added a 2nd version.) |
||
Line 140: | Line 140: | ||
=={{header|REXX}}== |
=={{header|REXX}}== |
||
=== version 1 === |
|||
Programming note: the three filters (marked below) could've been incorporated into one REXX statement if code golf is the desired goal. |
Programming note: the three filters (marked below) could've been incorporated into one REXX statement if code golf is the desired goal. |
||
<lang rexx>/*REXX program finds positive decimal integers which contain exactly two ones (1s). */ |
<lang rexx>/*REXX program finds positive decimal integers which contain exactly two ones (1s). */ |
||
Line 175: | Line 176: | ||
───────┴─────────────────────────────────────────────────────────────────────────────────────────────────────────────── |
───────┴─────────────────────────────────────────────────────────────────────────────────────────────────────────────── |
||
Found 27 positive decimal integers which |
Found 27 positive decimal integers which contain exactly two ones (1s) which are < 1000 |
||
</pre> |
</pre> |
||
=== version 2 === |
|||
Programming note: not all REXXes have the '''countstr''' BIF. |
|||
<lang rexx>/*REXX program finds positive decimal integers which contain exactly two ones (1s). */ |
|||
parse arg hi cols . /*obtain optional argument from the CL.*/ |
|||
if HI=='' | HI=="," then HI= 1000 /*Not specified? Then use the default.*/ |
|||
if cols=='' | cols=="," then cols= 10 /* " " " " " " */ |
|||
w= 10 /*width of a number in any column. */ |
|||
title= ' positive decimal integers which contain exactly two ones (1s) which are <' hi |
|||
say ' index │'center(title, 1 + cols*(w+1) ) |
|||
say '───────┼'center("" , 1 + cols*(w+1), '─') |
|||
found= 0; idx= 1 /*initialize # integers and the index. */ |
|||
$= /*a list of integers found (so far). */ |
|||
do j=1 for hi-1 /*find positive integers within range. */ |
|||
if countstr(1, j)\==2 then iterate /*Doesn't have exactly 2 one's? Skip. */ /* ◄■■■■■■■ a filter.*/ |
|||
found= found + 1 /*bump the number of integers found. */ |
|||
$= $ right(j, w) /*add an integer to the ──► $ list. */ |
|||
if found//cols\==0 then iterate /*have we populated a line of output? */ |
|||
say center(idx, 7)'│' substr($, 2); $= /*display what we have so far (cols). */ |
|||
idx= idx + cols /*bump the index count for the output*/ |
|||
end /*j*/ |
|||
/*stick a fork in it, we're all done. */ |
|||
if $\=='' then say center(idx, 7)"│" substr($, 2) /*possible display residual output.*/ |
|||
say '───────┴'center("" , 1 + cols*(w+1), '─') |
|||
say |
|||
say 'Found ' found title</lang> |
|||
{{out|output|text= is identical to the 1<sup>st</sup> REXX version.}} <br><br> |
|||
=={{header|Ring}}== |
=={{header|Ring}}== |