@echo off
if %1.==. ( echo Missing parameter! Try passing the number as a parameter like 'factorial 10' without the quotes.
goto end )
setlocal enabledelayedexpansion
set /a count=0
set /a temp=0
set /a digits=1
set /a array1=1
for /L %%i IN (2,1,%1) do (
set /a temp=0
for /L %%j IN ( 1,1,!digits! ) do (
set /a temp=!temp!+!array%%j!*%%i
set /a array%%j=!temp!%%10
set /a temp=!temp!/10 )
set /a index=!digits!+1
for /L %%v IN (!index!,1,!index! ) do (
if !temp! NEQ 0 (
set /a array!index!=!temp!%%10
set /a temp/=10
set /a index+=1 ))
set /a digits=!index!-1)
for /l %%v IN ( !digits!,-1,1 ) do set array=!array!!array%%v!
echo !array!
echo Total # of decimal digits = !digits!
:end
pause
This is what i have gotten so far. It is quite stable under 10! but once i reach 15 or 20 it starts missing out a few digits.
My edit....
@echo off
if %1.==. ( echo Missing parameter! Try passing the number as a parameter like 'factorial 10' without the quotes.
goto end )
setlocal enabledelayedexpansion
set /a count=0
set /a temp=0
set /a digits=1
set /a array1=1
for /L %%i IN (2,1,%1) do (
set /a temp=0
for /L %%j IN ( 1,1,!digits! ) do (
set /a temp=!temp!+!array%%j!*%%i
set /a array%%j=!temp!%%10
set /a temp=!temp!/10 )
for /l %%v IN ( 1,1,30 ) do (
if !temp! neq 0 (
set /a digits+=1
set /a array!digits!=!temp!%%10
set /a temp=!temp!/10
)))
for /l %%v IN ( !digits!,-1,1 ) do set array=!array!!array%%v!
echo !array!
echo Total # of decimal digits = !digits!
:end
pause
Now i am forcing the the last inner loop to run 30 times eventhough temp would have been zero way before that. Is there any way to write a snippet that would be analogous to the following c code while (temp) {/code goes here/}
This execute only as long as temp is non zero.
Is there any partyicular limit to how big a variable can be in a batch? I know it is a pain * to debug computational programs in a batch, I'm just trying to code this in all programming languages i know, Just so i could compare their speeds. Can somebody Please point out what i'm doing wrong here.
edit........22/12/13
@echo off
if %1.==. ( echo Missing parameter! Try passing the number as a parameter like 'factorial 10' without the quotes.
goto end )
setlocal enabledelayedexpansion
set /a count=0
set /a tempo=0
set /a digits=1
set /a array1=1
for /f "tokens=1-4 delims=:.," %%a IN ("%time%") do (
set /a "start=(((%%a*60)+1%%b %% 100)*60+1%%c %%100)*100+1%%d %% 100"
)
for /L %%i IN (2,1,%1) do (
set /a tempo=0
for /L %%j IN ( 1,1,!digits! ) do (
set /a tempo=!tempo!+!array%%j!*%%i
set /a array%%j=!tempo!%%10000
set /a tempo=!tempo!/10000 )
for /l %%v IN (1,1,2) do (
if !tempo! neq 0 (
set /a digits+=1
set /a array!digits!=tempo%%10000
set /a tempo=tempo/10000
))
)
for /l %%v IN ( !digits!,-1,1 ) do set array=!array!!array%%v!
echo !array!
echo Total # of decimal digits = !digits!
for /f "tokens=1-4 delims=:.," %%a in ("%time%") do (
set /a "end=(((%%a*60)+1%%b %% 100)*60+1%%c %%100)*100+1%%d %% 100"
)
set /a elapsedcs=end-start
set /a elapseds=elapsedcs/100
set /a elapsedcs=elapsedcs%%100
echo %elapseds%.%elapsedcs% seconds
:end
rem label should never be the last statement
Is this what you meant aacini?