{"id":32018,"date":"2022-01-27T21:34:13","date_gmt":"2022-01-27T20:34:13","guid":{"rendered":"https:\/\/www.linuxboxen.dk\/?p=32018"},"modified":"2022-01-27T21:34:13","modified_gmt":"2022-01-27T20:34:13","slug":"beregning-af-tal-systemer-i-bash","status":"publish","type":"post","link":"https:\/\/www.linuxboxen.dk\/?p=32018","title":{"rendered":"Beregning af tal systemer i Bash"},"content":{"rendered":"

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\nDu ved sikkert nu at du kan lave test med tal og strenge samt filer i Bash. Men kan man bruge Bash til at regne mellem talsystemer.\u00a0 Her kan du se jeg kan skrive et echo som der pipes til bc som s\u00e5 regner det ud.<\/p>\n

ibase er fra tal<\/em> systemet. her 16 for hex tal.
\nobase er til tal<\/em> systemet, her A eller 10 decimal.
\nog s\u00e5 tallet som du skal omregne her A0 i hex tal.<\/p>\n

Du kan \u00e5bne bc og skrive kommandoen, men vil gerne vise dig hvordan man g\u00f8r det fra Bash.<\/p>\n

$ echo 'ibase=16;obase=A;A0' | bc\n160<\/pre>\n
Hvis du skal regne fra hex til bin\u00e6r skal du skrive.<\/p>\n
$ echo 'ibase=10;obase=2;160' | bc\n10100000<\/pre>\n
Kan du g\u00e6tte hvordan man omregner til hex igen fra bin\u00e6r tal.<\/p>\n
$ echo 'obase=16;ibase=2;10100000' | bc\nA0<\/pre>\n
S\u00e5dan kan du altid omregne mellem talsystemer. Bare bc er installeret.<\/p>\n
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Du ved sikkert nu at du kan lave test med tal og strenge samt filer i Bash. Men kan man bruge Bash til at regne mellem talsystemer.\u00a0 Her kan du se jeg kan skrive et echo som der pipes til bc som s\u00e5 regner det ud. ibase er fra tal systemet. her 16 for hex […]<\/p>\n
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