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slide 03
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143
SICP/slide03.tm
143
SICP/slide03.tm
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@ -57,7 +57,87 @@
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Tree Recursion
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Tree Recursion
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</cell>>>>
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</cell>>>>
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</wide-tabular>
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</wide-tabular>
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</shown>>
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</shown>|<\hidden>
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<tit|\<#6761\>\<#4EF6\>\<#8868\>\<#8FBE\>\<#5F0F\>\<#548C\>\<#8C13\>\<#8BCD\>\V\<#77ED\>\<#8DEF\>\<#8FD0\>\<#7B97\>>
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<\itemize>
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<item>\<#5E94\>\<#7528\>\<#5E8F\>\<#6C42\>\<#503C\>\<#FF08\>Scheme\<#4F7F\>\<#7528\>\<#7684\>\<#662F\>\<#5E94\>\<#7528\>\<#5E8F\>\<#6C42\>\<#503C\>\<#FF09\>
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<item>\<#6B63\>\<#5219\>\<#5E8F\>\<#6C42\>\<#503C\>
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</itemize>
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<subparagraph|\<#6848\>\<#4F8B\>\<#5206\>\<#6790\>\<#FF1A\>\<#5B9E\>\<#73B0\>\<#6C42\>\<#7EDD\>\<#5BF9\>\<#503C\>\<#7684\>\<#591A\>\<#79CD\>\<#65B9\>\<#5F0F\>>
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<\with|par-columns|2>
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<\equation*>
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<around|\||x|\|>=<around*|{|<tabular|<tformat|<cwith|1|-1|1|1|cell-halign|r>|<cwith|1|-1|2|2|cell-halign|l>|<cwith|1|-1|3|3|cell-halign|l>|<table|<row|<cell|x>|<cell|<with|mode|text|if>>|<cell|x\<gtr\>0,>>|<row|<cell|0>|<cell|<with|mode|text|if>>|<cell|x=0,>>|<row|<cell|-x>|<cell|<with|mode|text|if>>|<cell|x\<less\>0.>>>>>|\<nobracket\>>
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</equation*>
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<\session|scheme|default>
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<\unfolded-io|Scheme] >
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(define (abs1 x)
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\ \ (cond ((\<gtr\> x 0) x)
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\ \ \ \ \ \ \ \ ((= x 0) 0)
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\ \ \ \ \ \ \ \ (else (- x))))
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<|unfolded-io>
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abs1
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</unfolded-io>
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<\unfolded-io|Scheme] >
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(define (abs2 x)
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\ \ (if (\<gtr\> x 0)
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\ \ \ \ \ \ x
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\ \ \ \ \ \ (- x)))
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<|unfolded-io>
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abs2
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</unfolded-io>
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<\unfolded-io|Scheme] >
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(define (abs3 x)
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\ \ (or (and (\<gtr\> x) x) (- x)))
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<|unfolded-io>
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abs3
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</unfolded-io>
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<\unfolded-io|Scheme] >
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(abs1 1)
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<|unfolded-io>
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1
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</unfolded-io>
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<\unfolded-io|Scheme] >
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(abs1 -1)
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<|unfolded-io>
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1
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</unfolded-io>
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<\input|Scheme] >
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\;
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</input>
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</session>
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</with>
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<\folded>
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<\question>
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\<#4E3A\>\<#4EC0\>\<#4E48\><scm|if>\<#548C\><scm|cond>\<#662F\>\<#5FC5\>\<#987B\>\<#7684\>\<#FF1F\>
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</question>
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<|folded>
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<\exercise>
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\<#4F7F\>\<#7528\><scm|if>\<#5B9E\>\<#73B0\><scm|and>\<#548C\><scm|or>\<#3002\>
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</exercise>
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\<#53C2\>\<#8003\>\<#6587\>\<#6863\>\<#FF1A\><slink|https://www.scheme.com/tspl2d/grammar.html>
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</folded>
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\;
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</hidden>>
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</body>
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</body>
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<\initial>
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<\initial>
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@ -66,70 +146,13 @@
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<associate|marked-color|pastel yellow>
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<associate|marked-color|pastel yellow>
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<associate|page-medium|beamer>
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<associate|page-medium|beamer>
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<associate|page-screen-margin|false>
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<associate|page-screen-margin|false>
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<associate|par-columns|1>
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<associate|preamble|false>
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<associate|preamble|false>
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</collection>
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</collection>
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</initial>
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</initial>
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<\references>
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<\references>
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<\collection>
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<\collection>
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<associate|auto-1|<tuple|?|?|slide01.tm>>
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<associate|auto-1|<tuple|1|?>>
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<associate|auto-10|<tuple|2|?|slide01.tm>>
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<associate|auto-11|<tuple|1|?|slide01.tm>>
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<associate|auto-12|<tuple|applicative order evaluation|?|slide01.tm>>
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<associate|auto-13|<tuple|2|?|slide01.tm>>
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<associate|auto-14|<tuple|normal order evaluation|?|slide01.tm>>
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<associate|auto-15|<tuple|2|?|slide01.tm>>
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<associate|auto-2|<tuple|normal order evaluation|?|slide01.tm>>
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<associate|auto-3|<tuple|2|?|slide01.tm>>
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<associate|auto-4|<tuple|2|?|slide01.tm>>
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<associate|auto-5|<tuple|normal order evaluation|?|slide01.tm>>
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<associate|auto-6|<tuple|2|?|slide01.tm>>
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<associate|auto-7|<tuple|2|?|slide01.tm>>
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<associate|auto-8|<tuple|2|?|slide01.tm>>
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<associate|auto-9|<tuple|normal order evaluation|?|slide01.tm>>
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</collection>
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</collection>
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</references>
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</references>
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<\auxiliary>
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<\collection>
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<\associate|figure>
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<tuple|normal|<surround|<hidden-binding|<tuple>|1>||\<#64CD\>\<#4F5C\>\<#7B26\>\<#548C\>\<#64CD\>\<#4F5C\>\<#6570\>>|<pageref|auto-7>>
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<tuple|normal|<surround|<hidden-binding|<tuple>|2>||\<#4E00\>\<#4E2A\>\<#5177\>\<#4F53\>\<#7684\>\<#4F8B\>\<#5B50\>>|<pageref|auto-8>>
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</associate>
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<\associate|gly>
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<tuple|normal|primitive|\<#539F\>\<#8BED\>|<pageref|auto-1>>
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<tuple|normal|expression|\<#8868\>\<#8FBE\>\<#5F0F\>|<pageref|auto-2>>
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<tuple|normal|procedure|\<#51FD\>\<#6570\>|<pageref|auto-3>>
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<tuple|normal|combination|\<#7EC4\>\<#5408\>|<pageref|auto-4>>
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<tuple|normal|abstraction|\<#62BD\>\<#8C61\>|<pageref|auto-5>>
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<tuple|normal|combinations|\<#7EC4\>\<#5408\>\<#5F0F\>|<pageref|auto-6>>
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<tuple|normal|compound procedure|\<#590D\>\<#5408\>\<#51FD\>\<#6570\>|<pageref|auto-9>>
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<tuple|normal|substitution model|\<#4EE3\>\<#6362\>\<#6A21\>\<#578B\>|<pageref|auto-10>>
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<tuple|normal|applicative order evaluation|\<#5E94\>\<#7528\>\<#5E8F\>\<#6C42\>\<#503C\>|<pageref|auto-12>>
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<tuple|normal|normal order evaluation|\<#6B63\>\<#5219\>\<#5E8F\>\<#6C42\>\<#503C\>|<pageref|auto-14>>
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</associate>
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<\associate|toc>
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<with|par-left|<quote|3tab>|\<#5E94\>\<#7528\>\<#5E8F\>\<#6C42\>\<#503C\>
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<datoms|<macro|x|<repeat|<arg|x>|<with|font-series|medium|<with|font-size|1|<space|0.2fn>.<space|0.2fn>>>>>|<htab|5mm>>
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<no-break><pageref|auto-11>>
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<with|par-left|<quote|3tab>|\<#6B63\>\<#5219\>\<#5E8F\>\<#6C42\>\<#503C\>
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<datoms|<macro|x|<repeat|<arg|x>|<with|font-series|medium|<with|font-size|1|<space|0.2fn>.<space|0.2fn>>>>>|<htab|5mm>>
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<no-break><pageref|auto-13>>
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<vspace*|1fn><with|font-series|<quote|bold>|math-font-series|<quote|bold>|\<#672F\>\<#8BED\>\<#8868\>>
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<datoms|<macro|x|<repeat|<arg|x>|<with|font-series|medium|<with|font-size|1|<space|0.2fn>.<space|0.2fn>>>>>|<htab|5mm>>
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<no-break><pageref|auto-15><vspace|0.5fn>
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</associate>
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</collection>
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</auxiliary>
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