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在DOS時代通配符是搜索的必備參數，到現在還是在很多場合使用。

當我們看到wildcard這個單詞時，可能會感到費解，從字面上看是“野的”、“卡片”，怎么會跟計算機有什么關系，莫名其妙。

下面就介紹一下這個家伙：

通配符

wildcard character

定義：

A special symbol that stands for one or more characters. Many operating systems and applications support wildcards for identifying files and directories. This enables you to select multiple files with a single specification. For example, in DOS and Windows, the asterisk (*) is a wild card that stands for any combination of letters. The file specification

m*

therefore, refers to all files that begin with m. Similarly, the specification

m*.doc

refers to all files that start with m and end with.doc.

Many word processors also support wild cards for performing text searches.

例子：

(wildcard characters * and ? allowed, see examples)

細分：

asterisk wildcard 星號通配符

question mark wildcard 問號通配符