Multiplication tables: Difference between revisions
Content added Content deleted
(→Python) |
Underscore (talk | contribs) m (→{{header|Haskell}}: Changed to use one zip instead of zipping and mapping.) |
||
Line 41: | Line 41: | ||
=={{header|Haskell}}== |
=={{header|Haskell}}== |
||
<lang haskell>import |
<lang haskell>import Control.Monad |
||
import Text.Printf |
|||
main = do |
main = do |
||
putStrLn $ " x" ++ concatMap fmt [1..12] |
putStrLn $ " x" ++ concatMap fmt [1..12] |
||
zipWithM_ f [1..12] $ iterate (" " ++) "" |
|||
where f n s = fmt n ++ s ++ concatMap (fmt . (*n)) [n..12] |
where f n s = putStrLn $ fmt n ++ s ++ concatMap (fmt . (*n)) [n..12] |
||
fmt n = printf "%4d" (n :: Int)</lang> |
fmt n = printf "%4d" (n :: Int)</lang> |
||
Revision as of 20:01, 5 December 2009
Multiplication tables
You are encouraged to solve this task according to the task description, using any language you may know.
You are encouraged to solve this task according to the task description, using any language you may know.
Produce a formatted 12×12 multiplication table of the kind memorised by rote when in primary school.
Only print the top half triangle of products.
ALGOL 68
<lang Algol68>main:(
INT max = 12; STRING empty cell = " "; FORMAT fmt = $zz-d$;
print(" x"); FOR col TO max DO printf((fmt, col)) OD; print (new line);
FOR row TO max DO printf((fmt,row)); FOR col TO row-1 DO print(empty cell) OD; [row:max]INT product; FOR col FROM row TO max DO product[col]:=row*col OD; printf((fmt, product, $l$)) OD
)</lang> Output:
x 1 2 3 4 5 6 7 8 9 10 11 12 1 1 2 3 4 5 6 7 8 9 10 11 12 2 4 6 8 10 12 14 16 18 20 22 24 3 9 12 15 18 21 24 27 30 33 36 4 16 20 24 28 32 36 40 44 48 5 25 30 35 40 45 50 55 60 6 36 42 48 54 60 66 72 7 49 56 63 70 77 84 8 64 72 80 88 96 9 81 90 99 108 10 100 110 120 11 121 132 12 144
Haskell
<lang haskell>import Control.Monad import Text.Printf
main = do
putStrLn $ " x" ++ concatMap fmt [1..12] zipWithM_ f [1..12] $ iterate (" " ++) "" where f n s = putStrLn $ fmt n ++ s ++ concatMap (fmt . (*n)) [n..12] fmt n = printf "%4d" (n :: Int)</lang>
Python
<lang python>>>> for row in range(13): print(" ".join("%3s" % ("x" if row==col==0 else row if row and col==0 else col if row==0 else "" if row>col else row*col) for col in range(13)))
x 1 2 3 4 5 6 7 8 9 10 11 12 1 1 2 3 4 5 6 7 8 9 10 11 12 2 4 6 8 10 12 14 16 18 20 22 24 3 9 12 15 18 21 24 27 30 33 36 4 16 20 24 28 32 36 40 44 48 5 25 30 35 40 45 50 55 60 6 36 42 48 54 60 66 72 7 49 56 63 70 77 84 8 64 72 80 88 96 9 81 90 99 108 10 100 110 120 11 121 132 12 144
>>> </lang>
Tcl
<lang tcl>puts " x\u2502 1 2 3 4 5 6 7 8 9 10 11 12" puts \u0020\u2500\u2500\u253c[string repeat \u2500 48] for {set i 1} {$i <= 12} {incr i} {
puts -nonewline [format "%3d" $i]\u2502[string repeat " " [expr {$i*4-4}]] for {set j 1} {$j <= 12} {incr j} {
if {$j >= $i} { puts -nonewline [format "%4d" [expr {$i*$j}]] }
} puts ""
}</lang> Output:
x│ 1 2 3 4 5 6 7 8 9 10 11 12 ──┼──────────────────────────────────────────────── 1│ 1 2 3 4 5 6 7 8 9 10 11 12 2│ 4 6 8 10 12 14 16 18 20 22 24 3│ 9 12 15 18 21 24 27 30 33 36 4│ 16 20 24 28 32 36 40 44 48 5│ 25 30 35 40 45 50 55 60 6│ 36 42 48 54 60 66 72 7│ 49 56 63 70 77 84 8│ 64 72 80 88 96 9│ 81 90 99 108 10│ 100 110 120 11│ 121 132 12│ 144