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102 lines
2.2 KiB
Markdown
102 lines
2.2 KiB
Markdown
---
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id: 5a23c84252665b21eecc7eb0
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title: I 在 E 之前，除了 C 之后
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challengeType: 1
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forumTopicId: 302288
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dashedName: i-before-e-except-after-c
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---
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# --description--
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**<a href="http://www.rosettacode.org/wiki/I_before_E_except_after_C" target="_blank" rel="noopener noreferrer nofollow">"I before E, except after C"</a>** is a general rule for English language spelling. If one is unsure whether a word is spelled with the digraph `ei` or `ie`, the rhyme suggests that the correct order is `ie` unless the preceding letter is `c`, in which case it may be `ei`.
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Using the words provided, check if the two sub-clauses of the phrase are plausible individually:
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<ol>
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<li>
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<i>"I before E when not preceded by C".</i>
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</li>
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<li>
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<i>"E before I when preceded by C".</i>
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</li>
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</ol>
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如果两个子短语都是合理的，则原始短语可以说是合理的。
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# --instructions--
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Write a function that accepts a word and check if the word follows this rule. The function should return true if the word follows the rule and false if it does not.
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# --hints--
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`IBeforeExceptC` 应该是一个函数。
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```js
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assert(typeof IBeforeExceptC == 'function');
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```
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`IBeforeExceptC("receive")` 应该返回一个布尔值。
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```js
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assert(typeof IBeforeExceptC('receive') == 'boolean');
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```
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`IBeforeExceptC("receive")` 应该返回 `true`。
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```js
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assert.equal(IBeforeExceptC('receive'), true);
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```
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`IBeforeExceptC("science")` 应该返回 `false`。
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```js
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assert.equal(IBeforeExceptC('science'), false);
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```
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`IBeforeExceptC("imperceivable")` 应该返回 `true`。
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```js
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assert.equal(IBeforeExceptC('imperceivable'), true);
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```
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`IBeforeExceptC("inconceivable")` 应该返回 `true`。
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```js
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assert.equal(IBeforeExceptC('inconceivable'), true);
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```
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`IBeforeExceptC("insufficient")` 应该返回 `false`.
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```js
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assert.equal(IBeforeExceptC('insufficient'), false);
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```
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`IBeforeExceptC("omniscient")` 应该返回 `false`.
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```js
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assert.equal(IBeforeExceptC('omniscient'), false);
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```
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# --seed--
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## --seed-contents--
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```js
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function IBeforeExceptC(word) {
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}
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```
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# --solutions--
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```js
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function IBeforeExceptC(word)
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{
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if(word.indexOf("c")==-1 && word.indexOf("ie")!=-1)
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return true;
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else if(word.indexOf("cei")!=-1)
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return true;
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return false;
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}
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```
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