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
therefore, refers to all files that begin with m. Similarly, the specification
refers to all files that start with m and end with.doc.
Many word processors also support wild cards for performing text searches.
(wildcard characters * and ? allowed, see examples)
asterisk wildcard 星号通配符
question mark wildcard 问号通配符