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freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/rosetta-code/count-the-coins.md

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---
id: 59713bd26bdeb8a594fb9413
title: 计算硬币
challengeType: 5
videoUrl: ''
---
# --description--
<p> <a href='https://en.wikipedia.org/wiki/United_States' title='链接https//en.wikipedia.org/wiki/United_States'>美国</a>货币有四种常见硬币: </p>季度25美分硬币10美分5美分和便士1美分 <p>有六种方法可以换15美分 </p>一角钱和一角钱一角钱和5便士3镍2镍和5便士一镍和10便士15便士任务 <p>实现一个功能,以确定使用这些普通硬币改变一美元的方式有多少? 1美元= 100美分</p>参考: <a href='http://mitpress.mit.edu/sicp/full-text/book/book-Z-H-11.html#%_sec_Temp_52' title='链接http//mitpress.mit.edu/sicp/full-text/book/book-Z-H-11.html#%_sec_Temp_52'>麻省理工学院出版社的算法</a>
# --hints--
`countCoins`是一个函数。
```js
assert(typeof countCoins === 'function');
```
`countCoints()`应该返回242。
```js
assert.equal(countCoins(), 242);
```
# --solutions--