drracket吧
Lisp-Scheme-Racket语言交流吧
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1
2014-05-08
【每日一题028】Number spiral diagonals
;;;racket ;;;drracket Starting with the number 1 and moving to the right in a……
🧑周玉斌👀🍭
1
2014-05-08
【每日一题027】Quadratic primes
Euler discovered the remarkable quadratic formula: n² + n + 41 It turns out t……
🧑周玉斌👀🍭
6
2014-05-02
【每日一题，链接汇总】
更新周期： 每周累计更新 > 5 题~~~ ---------------------------- 链接每20题一帖； 新题先上一帖帖中帖，然后挤满20……
🧑周玉斌👀🍭
0
2014-05-02
【每日一题035】Circular primes
The number, 197, is called a circular prime because all rotations of the digi……
🧑周玉斌👀🍭
0
2014-05-02
【每日一题034】Digit factorials
145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145. Find the sum o……
🧑周玉斌👀🍭
1
2014-05-02
【每日一题026】Reciprocal cycles
A unit fraction contains 1 in the numerator. The decimal representation of th……
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1
2014-05-02
【每日一题025】1000-digit Fibonacci number
The Fibonacci sequence is defined by the recurrence relation: Fn = Fn1 + Fn2,……
🧑周玉斌👀🍭
2
2014-05-02
自己用call/cc实现树比较。。。出bug了？？
先上代码，然后运行结果。 大家帮忙找找到底哪里写错了。。。 ---------------------------- (define (tree-walk……
🧑周玉斌👀🍭
3
2014-05-02
【每日一题024】Lexicographic permutations
A permutation is an ordered arrangement of objects. For example, 3124 is one ……
🧑周玉斌👀🍭
1
2014-04-29
【每日一题023】Non-abundant sums
A perfect number is a number for which the sum of its proper divisors is exac……
🧑周玉斌👀🍭
3
2014-04-26
<求助>求大神们帮忙看看颜色作为变量怎么定义？
初学dr racket ,被题目难倒了。求助吧内大神！ 题目是要编写一个图，要有两个颜色和一个数字作为变量，要能改变颜色和数字之后图形的意义也发生变化。 ……
🧑司马鸣渊
2
2014-04-26
【每日一题022】Names scores
Using names.txt (right click and 'Save Link/Target As...'), a 46K text file c……
🧑周玉斌👀🍭
1
2014-04-26
【每日一题021】Amicable numbers
Let d(n) be defined as the sum of proper divisors of n (numbers less than n w……
🧑周玉斌👀🍭
11
2014-04-23
【SICP习题3.66解答】全网唯一正确的解答！！
http://tieba.baidu.com/mo/q/checkurl?url=http%3A%2F%2Fcommunity.schemewiki.or……
🧑周玉斌👀🍭
1
2014-04-23
【每日一题019】Counting Sundays
You are given the following information, but you may prefer to do some resear……
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0
2014-04-21
数据导向，消息传递，智能操作，智能数据对象。。。
一楼喂度娘~~~ 加深理解 3.3.4-3.3.5练习为另一种风格的程序。
🧑周玉斌👀🍭
3
2014-04-21
【SICP 3.3.5】约束传播
;;;3.3.5约束传播 ;--------------------- ;--------------------- ;;;这一连接器是否有值 ;;(ha……
🧑周玉斌👀🍭
12
2014-04-19
新手请教个问题
一楼喂熊
🧑loli追猎者
3
2014-04-19
【每日一题016】Power digit sum
215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26. What is the ……
🧑周玉斌👀🍭
5
2014-04-17
【SICP 3.3.4】数字电路的模拟器
目录： 1.实现代码 2.范例代码 3.自己的理解 4.。。。。
🧑周玉斌👀🍭
5
2014-04-16
【每日一题015】Lattice paths
Starting in the top left corner of a 22 grid, and only being able to move to ……
🧑周玉斌👀🍭
3
2014-04-14
【每日一题014】Longest Collatz sequence
The following iterative sequence is defined for the set of positive integers:……
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3
2014-04-14
【每日一题013】Large sum
附加要求，编写一个自己的大数加法程序，用于此题的运算。 （设定，程序最多只能做两个十位数的加法，和最高位的进位。） Work out the first ……
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2
2014-04-13
【每日一题012】Highly divisible triangular number
The sequence of triangle numbers is generated by adding the natural numbers. ……
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9
2014-04-13
【SICP 2.4.3-2.5】带有通用型操作的数系统
发帖占楼~~~~
🧑周玉斌👀🍭
0
2014-04-10
【宏——把字符串转换成过程】
改日用第二类安全宏来实现。 (require compatibility/defmacro) (define-macro (string->procedu……
🧑周玉斌👀🍭
6
2014-04-09
【SICP3.3】用变动数据做模拟
占楼~~~
🧑周玉斌👀🍭
1
2014-04-09
【每日一题010】Summation of primes
The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the……
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1
2014-04-08
【每日一题009】Special Pythagorean triplet
A Pythagorean triplet is a set of three natural numbers, a b c, for which, ……
🧑周玉斌👀🍭
1
2014-04-03
【每日一题008】Largest product in a series
Find the greatest product of five consecutive digits in the 1000-digit number……
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