18 lines
374 B
Batchfile
18 lines
374 B
Batchfile
@echo off & setlocal
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if "%~2"=="" ( echo Usage: %~nx0 n k && goto :EOF )
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call :binom binom %~1 %~2
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1>&2 set /P "=%~1 choose %~2 = "<NUL
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echo %binom%
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goto :EOF
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:binom <var_to_set> <N> <K>
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setlocal
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set /a coeff=1, nk=%~2 - %~3 + 1
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for /L %%I in (%nk%, 1, %~2) do set /a coeff *= %%I
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for /L %%I in (1, 1, %~3) do set /a coeff /= %%I
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endlocal && set "%~1=%coeff%"
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goto :EOF
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