Basic Pascal Tutorial/Chapter 4/Solution/zh CN: what changed
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Title: Basic Pascal Tutorial/Chapter 4/Solution/zh CN
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| 1 | + | 4Ga - 汉诺塔参考答案 (原作者: Tao Yue, 状态: 英文部分为原文/中文部分有适当增删) | |
| 2 | + | ||
| 3 | + | ``` pascal | |
| 4 | + | (* Author: Tao Yue | |
| 5 | + | Date: 13 July 2000 | |
| 6 | + | Description: | |
| 7 | + | Solves the Towers of Hanoi | |
| 8 | + | Version: | |
| 9 | + | 1.0 - original version | |
| 10 | + | *) | |
| 11 | + | ||
| 12 | + | program TowersofHanoi; | |
| 13 | + | ||
| 14 | + | var | |
| 15 | + | numdiscs : integer; | |
| 16 | + | ||
| 17 | + | (********************************************************) | |
| 18 | + | ||
| 19 | + | procedure DoTowers (NumDiscs, OrigPeg, NewPeg, TempPeg : integer); | |
| 20 | + | (* Explanation of variables: | |
| 21 | + | Number of discs -- number of discs on OrigPeg/NumDiscs -- 初始塔高 | |
| 22 | + | OrigPeg -- peg number of the tower/一开始放塔的杆子的编号（初始杆） | |
| 23 | + | NewPeg -- peg number to move the tower to/要移到的杆子的编号（目标杆） | |
| 24 | + | TempPeg -- peg to use for temporary storage/剩余的那根杆子的编号（过度杆） | |
| 25 | + | *) | |
| 26 | + | ||
| 27 | + | begin | |
| 28 | + | (* Take care of the base case -- one disc / 解决最基本的情况——只有一个盘子*) | |
| 29 | + | if NumDiscs = 1 then | |
| 30 | + | writeln (OrigPeg, ' ---> ', NewPeg) | |
| 31 | + | (* Take care of all other cases / 解决其余情况*) | |
| 32 | + | else | |
| 33 | + | begin | |
| 34 | + | (* First, move all discs except the bottom disc | |
| 35 | + | 首先，把所有除了底层的圆盘移到 过度杆 | |
| 36 | + | to TempPeg, using NewPeg as the temporary peg | |
| 37 | + | 亦即把 过度杆 设定为新的 目标杆 | |
| 38 | + | for this transfer *) | |
| 39 | + | DoTowers (NumDiscs-1, OrigPeg, TempPeg, NewPeg); | |
| 40 | + | (* Now, move the bottommost disc from OrigPeg | |
| 41 | + | 现在，把底层的圆盘由 原本的初始杆 移到 原本的目标杆 | |
| 42 | + | to NewPeg *) | |
| 43 | + | writeln (OrigPeg, ' ---> ', NewPeg); | |
| 44 | + | (* Finally, move the discs which are currently on | |
| 45 | + | 最后，将位于 过度杆 的塔移到目标杆 | |
| 46 | + | TempPeg to NewPeg, using OrigPeg as the temporary | |
| 47 | + | 这时要将 原本的初始杆 作为 新的过度杆 | |
| 48 | + | peg for this transfer *) | |
| 49 | + | DoTowers (NumDiscs-1, TempPeg, NewPeg, OrigPeg) | |
| 50 | + | end | |
| 51 | + | end; | |
| 52 | + | ||
| 53 | + | (********************************************************) | |
| 54 | + | ||
| 55 | + | begin (* Main *) | |
| 56 | + | write ('Please enter the number of discs in the tower ===> '); {* 请输入圆盘数 ===> *} | |
| 57 | + | readln (numdiscs); | |
| 58 | + | writeln; | |
| 59 | + | DoTowers (numdiscs, 1, 3, 2) | |
| 60 | + | end. (* Main *) | |
| 61 | + | ``` | |
| 62 | + | ||
| 63 | + | | | | | | |
| 64 | + | |----|----|----| | |
| 65 | + | | [[Basic Pascal Tutorial/Chapter 4/Programming Assignment/zh CN|上一页]] | [[Basic Pascal Tutorial/Contents/zh CN|目录]] | [[Basic Pascal Tutorial/Chapter 5/Enumerated types/zh CN|下一页]] | | |
| 66 | + | ||
| 67 | + | --- | |
| 68 | + | *From the Free Pascal wiki, page "Basic Pascal Tutorial/Chapter 4/Solution/zh CN", as it stood on 2022-08-20 after a change by Kai Burghardt, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* |