10 2024 档案
摘要：![sicp每日一题[2.63-2.64]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241031084044823-914644384.png)
Exercise 2.63 Each of the following two procedures converts a binary tree to a list. (define (tree->list-1 tree) (if (null? tree) '() (append (tree->l
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Exercise 2.63 Each of the following two procedures converts a binary tree to a list. (define (tree->list-1 tree) (if (null? tree) '() (append (tree->l
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摘要：![sicp每日一题[2.62]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241030080653431-1890749931.png)
Exercise 2.62 Give a (n) implementation of union-set for sets represented as ordered lists. 这道题难度也不大，思路是依次从两个集合中取第一个元素，比较他们的大小，把小的那个和剩下所有元素连接的结果连接起来。由
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Exercise 2.62 Give a (n) implementation of union-set for sets represented as ordered lists. 这道题难度也不大，思路是依次从两个集合中取第一个元素，比较他们的大小，把小的那个和剩下所有元素连接的结果连接起来。由
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摘要：![sicp每日一题[2.61]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241029081648411-1356264336.png)
Exercise 2.61 Give an implementation of adjoin-set using the ordered representation. By analogy with element-of-set? show how to take advantage of the
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Exercise 2.61 Give an implementation of adjoin-set using the ordered representation. By analogy with element-of-set? show how to take advantage of the
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摘要：![sicp每日一题[2.60]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241028084031781-230444394.png)
Exercise2.60 We specified that a set would be represented as a list with no duplicates. Now suppose we allow duplicates. For instance, the set {1, 2,
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Exercise2.60 We specified that a set would be represented as a list with no duplicates. Now suppose we allow duplicates. For instance, the set {1, 2,
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摘要：![sicp每日一题[2.59]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241027090909467-1985705850.png)
Exercise 2.59 Implement the union-set operation for the unordered-list representation of sets. 这道题很简单，仿照 intersection-set 稍作修改就可以实现了 (define (union-se
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Exercise 2.59 Implement the union-set operation for the unordered-list representation of sets. 这道题很简单，仿照 intersection-set 稍作修改就可以实现了 (define (union-se
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摘要：![sicp每日一题[2.58]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241026131646376-1423759363.png)
Exercise 2.58 Suppose we want to modify the differentiation program so that it works with ordinary mathematical notation, in which + and * are infix r
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Exercise 2.58 Suppose we want to modify the differentiation program so that it works with ordinary mathematical notation, in which + and * are infix r
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摘要：![sicp每日一题[2.57]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241025083052391-920535210.png)
Exercise 2.57 Extend the differentiation program to handle sums and products of arbitrary numbers of (two or more) terms. Then the last example above
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Exercise 2.57 Extend the differentiation program to handle sums and products of arbitrary numbers of (two or more) terms. Then the last example above
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摘要：![sicp每日一题[2.56]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241024081955246-1426659414.png)
Exercise 2.56 Show how to extend the basic differentiator to handle more kinds of expressions. For instance, implement the differentiation rule d(x^n)
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Exercise 2.56 Show how to extend the basic differentiator to handle more kinds of expressions. For instance, implement the differentiation rule d(x^n)
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摘要：![sicp每日一题[2.53-2.55]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241023082445018-1169342153.png)
2.53不用写代码，2.54和2.55属于一道题，所以就放到一起吧 Exercise2.53 What would the interpreter print in response to evaluating each of the following expressions? (list 'a
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2.53不用写代码，2.54和2.55属于一道题，所以就放到一起吧 Exercise2.53 What would the interpreter print in response to evaluating each of the following expressions? (list 'a
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摘要：![sicp每日一题[2.52]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241022104356916-332102104.png)
Exercise 2.52 Make changes to the square limit of wave shown in Figure 2.9 by working at each of the levels described above. In particular: a. Add som
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Exercise 2.52 Make changes to the square limit of wave shown in Figure 2.9 by working at each of the levels described above. In particular: a. Add som
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摘要：![sicp每日一题[2.51]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241021084646832-998666087.png)
Exercise2.51 Define the below operation for painters. below takes two painters as arguments. The resulting painter, given a frame, draws with the firs
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Exercise2.51 Define the below operation for painters. below takes two painters as arguments. The resulting painter, given a frame, draws with the firs
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摘要：![sicp每日一题[2.50]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241020091207950-1064448858.png)
Exercise 2.50 Define the transformation flip-horiz, which flips painters horizontally, and transformations that rotate painters counterclockwise by 18
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Exercise 2.50 Define the transformation flip-horiz, which flips painters horizontally, and transformations that rotate painters counterclockwise by 18
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摘要：![sicp每日一题[2.49]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241019124518297-1770825096.png)
Exercise 2.49 Use segments->painter to define the following primitive painters: a. The painter that draws the outline of the designated frame. b. The
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Exercise 2.49 Use segments->painter to define the following primitive painters: a. The painter that draws the outline of the designated frame. b. The
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摘要：![sicp每日一题[2.48]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241018085320672-996384321.png)
Exercise 2.48 A directed line segment in the plane can be represented as a pair of vectors—the vector running from the origin to the start-point of th
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Exercise 2.48 A directed line segment in the plane can be represented as a pair of vectors—the vector running from the origin to the start-point of th
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摘要：![sicp每日一题[2.47]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241017084033019-514759581.png)
Exercise 2.47 Here are two possible constructors for frames: (define (make-frame origin edge1 edge2) (list origin edge1 edge2)) (define (make-frame or
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Exercise 2.47 Here are two possible constructors for frames: (define (make-frame origin edge1 edge2) (list origin edge1 edge2)) (define (make-frame or
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摘要：![sicp每日一题[2.46]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241016083505549-698758024.png)
Exercise 2.46 A two-dimensional vector v running from the origin to a point can be represented as a pair consisting of an x-coordinate and a y-coordin
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Exercise 2.46 A two-dimensional vector v running from the origin to a point can be represented as a pair consisting of an x-coordinate and a y-coordin
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摘要：![sicp每日一题[2.45]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241015082100153-151915266.png)
right-split and up-split can be expressed as instances of a general splitting operation. Define a procedure split with the property that evaluating (d
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right-split and up-split can be expressed as instances of a general splitting operation. Define a procedure split with the property that evaluating (d
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摘要：![sicp每日一题[2.44]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241014082058307-728516876.png)
我在这一章遇到了一个大问题，就是书上用的那些函数 beside, wave, flip-vert 我统统用不了。我用的是 DrRacket 这个软件，在网上查了半天，终于找到了解决办法。 首先是官方教程，在 DrRacket 中依次打开 File -> Package Manager...，在弹出的
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我在这一章遇到了一个大问题，就是书上用的那些函数 beside, wave, flip-vert 我统统用不了。我用的是 DrRacket 这个软件，在网上查了半天，终于找到了解决办法。 首先是官方教程，在 DrRacket 中依次打开 File -> Package Manager...，在弹出的
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摘要：![sicp每日一题[2.43]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241013075600910-825810581.png)
Exercise 2.43 Louis Reasoner is having a terrible time doing Exercise 2.42. His queens procedure seems to work, but it runs extremely slowly. (Louis n
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Exercise 2.43 Louis Reasoner is having a terrible time doing Exercise 2.42. His queens procedure seems to work, but it runs extremely slowly. (Louis n
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摘要：![sicp每日一题[2.42]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241012082032518-786686759.png)
这道题太难了，我自己只完成了 empty-board 这一个定义，其他的函数即使看了别人的答案也研究了半天才搞明白。。 ; board-size 指的是正方形棋盘的长 (define (queens board-size) (define (queen-cols k) (if (= k 0) (li
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这道题太难了，我自己只完成了 empty-board 这一个定义，其他的函数即使看了别人的答案也研究了半天才搞明白。。 ; board-size 指的是正方形棋盘的长 (define (queens board-size) (define (queen-cols k) (if (= k 0) (li
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摘要：![sicp每日一题[2.41]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241011082340154-1765540272.png)
Exercise 2.41 Write a procedure to find all ordered triples of distinct positive integers i, j, and k less than or equal to a given integer n that sum
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Exercise 2.41 Write a procedure to find all ordered triples of distinct positive integers i, j, and k less than or equal to a given integer n that sum
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摘要：![sicp每日一题[2.40]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241010083804698-527601139.png)
Exercise2.40 Define a procedure unique-pairs that, given an integer n, generates the sequence of pairs (i, j) with 1 < j < i < n. Use unique-pairs to
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Exercise2.40 Define a procedure unique-pairs that, given an integer n, generates the sequence of pairs (i, j) with 1 < j < i < n. Use unique-pairs to
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摘要：![sicp每日一题[2.38-2.39]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241009090134536-1115269468.png)
Exercise 2.38 The accumulate procedure is also known as fold-right, because it combines the first element of the sequence with the result of combining
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Exercise 2.38 The accumulate procedure is also known as fold-right, because it combines the first element of the sequence with the result of combining
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摘要：![sicp每日一题[2.36-2.37]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241008112514593-1989310994.png)
果然习惯不能停，就两天没学，昨天就忘的干干净净了。。今天把昨天的补上 Exercise 2.36 The procedure accumulate-n is similar to accumulate except that it takes as its third argument a sequ
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果然习惯不能停，就两天没学，昨天就忘的干干净净了。。今天把昨天的补上 Exercise 2.36 The procedure accumulate-n is similar to accumulate except that it takes as its third argument a sequ
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摘要：![sicp每日一题[2.35]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241006213004536-1580057846.png)
十一去喀纳斯玩了2天，今天恢复，才几天没看书再看到代码就感到有点陌生了。。 Exercise 2.35 Redefine count-leaves from Section 2.2.2 as an accumulation: (define (count-leaves t) (accumulate
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十一去喀纳斯玩了2天，今天恢复，才几天没看书再看到代码就感到有点陌生了。。 Exercise 2.35 Redefine count-leaves from Section 2.2.2 as an accumulation: (define (count-leaves t) (accumulate
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