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curriculum/challenges/chinese/10-coding-interview-prep/rosetta-code/execute-brain.md
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---
id: 59e0a8df964e4540d5abe599
title: 执行大脑****
title: Execute Brain****
challengeType: 5
videoUrl: ''
forumTopicId: 302261
dashedName: execute-brain
---
# --description--
<p>编写一个函数来实现Brain ****解释器。该函数将字符串作为参数，并应返回一个字符串作为输出。更多细节如下： </p><p> <a href='http://rosettacode.org/wiki/Brainf***' title='Brainf ***'>RCBF</a>是一套为各种语言的Rosetta Code编写的<a href='http://rosettacode.org/wiki/Brainf***' title='Brainf ***'>Brainf ***</a>编译器和解释器。 </p><p>以下是RCBF每个版本的链接。 </p><p>实现只需要正确实现以下指令： </p><p> {| </p><p> ！命令</p><p> ！描述</p><p> | - </p><p> |风格=“文本对齐：中心” | <code>></code> ||将指针向右移动</p><p> | - </p><p> |风格=“文本对齐：中心” | <code>&#x3C;</code> ||将指针移到左侧</p><p> | - </p><p> |风格=“文本对齐：中心” | <code>+</code> ||增加指针下的内存单元格</p><p> | - </p><p> |风格=“文本对齐：中心” | <code>-</code> ||减少指针下的内存单元格</p><p> | - </p><p> |风格=“文本对齐：中心” | <code>.</code> ||输出指针处单元格表示的字符</p><p> | - </p><p> |风格=“文本对齐：中心” | <code>,</code> ||输入一个字符并将其存储在指针的单元格中</p><p> | - </p><p> |风格=“文本对齐：中心” | <code>[</code> ||如果指针下的单元格为0，则跳过匹配<code>]</code> </p><p> | - </p><p> |风格=“文本对齐：中心” | <code>]</code> ||跳回匹配<code>[</code>如果指针下的单元格非零</p><p> |} </p><p>允许任何单元格大小，EOF（ <u>E</u> nd- <u>O</u> - <u>F</u> ile）支持是可选的，无论您是否有有界或无界内存。 </p>
Write a function to implement a Brain\*\*\*\* interpreter. The function will take a string as a parameter and should return a string as the output. More details are given below:
RCBF is a set of [Brainf\*\*\*](https://rosettacode.org/wiki/Brainf*** "Brainf\*\*\*") compilers and interpreters written for Rosetta Code in a variety of languages.
Below are links to each of the versions of RCBF.
An implementation need only properly implement the following instructions:
| Command | Description |
| ------------------------- | ------------------------------------------------------------------------------------------ |
| <code>></code> | Move the pointer to the right |
| <code>&lt;</code> | Move the pointer to the left |
| <code>+</code> | Increment the memory cell under the pointer |
| <code>-</code> | Decrement the memory cell under the pointer |
| <code>.</code> | Output the character signified by the cell at the pointer |
| <code>,</code> | Input a character and store it in the cell at the pointer |
| <code>\[</code> | Jump past the matching <code>]</code> if the cell under the pointer is 0 |
| <code>]</code> | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
# --hints--
`brain(bye)`应该重新调整一个字符串
`brain(bye)` should return a string
```js
assert(typeof brain(bye) === 'string');
```
<code>brain("++++++[>++++++++++<-]>+++++.")&lt;/code should return "A"
`brain("++++++[>++++++++++<-]>+++++.")` should return "A"
```js
assert.equal(brain('++++++[>++++++++++<-]>+++++.'), 'A');
```
`brain(bye)`应该回归`Goodbye, World!\\r\\n`
`brain(bye)` should return `Goodbye, World!\r\n`
```js
assert.equal(brain(bye), 'Goodbye, World!\r\n');
```
`brain(hello)`应该回归`Hello World!\\n`
`brain(hello)` should return `Hello World!\n`
```js
assert.equal(brain(hello), 'Hello World!\n');
```
`brain(fib)`应该返回`1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
`brain(fib)` should return `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
```js
assert.equal(brain(fib), '1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89');