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你一事无成，还在那里傻乐。——韩寒《后会无期》过去的一年半，你踏入大学生活，接触了从未接触过的编程语言。你从一开始的C++语言跳到后来的C#语言，又从Common Lisp语言跳到Scheme语言，又从C语言跳到C#语言。直到现在算是定在了C#+Scheme。我不知道你还能坚持多久。... 阅读全文
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练习3-22原文Exercise 3.22. Instead of representing a queue as a pair of pointers, we can build a queue as a procedure with local state. The local... 阅读全文
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练习3-21原文Exercise 3.21. Ben Bitdiddle decides to test the queue implementation described above. He types in the procedures to the Lisp interpr... 阅读全文
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练习3-8原文Exercise 3.8. When we defined the evaluation model in section 1.1.3, we said that the first step in evaluating an expression is to eva... 阅读全文