Ethiopian multiplication: Difference between revisions
Content added Content deleted
(J: renamed "even test" function so its name matches values where it is true) |
(→{{header|Bash}}: added Bash solution) |
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print ethiopian(17, 34) |
print ethiopian(17, 34) |
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}</lang> |
}</lang> |
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=={{header|Bash}}== |
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<lang bash>halve() { |
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local n=$1 |
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echo -n $(( n / 2 )) |
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} |
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double() { |
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local n=$1 |
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echo -n $(( n * 2 )) |
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} |
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is_even() { |
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local n=$1 |
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[ $(( n % 2 )) -eq 0 ] |
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} |
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multiply() { |
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local plier=$1 |
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local plicand=$2 |
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local result=0 |
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while [ $plier -gt 0 ] |
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do |
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! is_even $plier && (( result += plicand )) |
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plier=$( halve $plier ) |
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plicand=$( double $plicand ) |
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done |
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echo -n $result |
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} |
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echo $( multiply 17 34 )</lang> |
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=={{header|BASIC}}== |
=={{header|BASIC}}== |
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