Therefore the regular expression A*B will match the strings AB, AAB, AAAB, or any other string starting with an A and ending with a single B.

因此，正则表达式 A*B将与字符串AB 、AAB 、AAAB或任何其它以 A 开头并以单个 B 为结尾的字符串相匹配。

youdao

For instance, the option string ab: indicates that the calling program knows two options: -a and -b, and that the next word after -b is a supplemental argument. Here's how the code looks.

例如，选项字符串ab：表示调用程序已知两个选项：- a和-b，- b后的下一个单词是补充参数。

youdao

For instance, the option string ab: indicates that the calling program knows two options: -a and -b, and that the next word after -b is a supplemental argument. Here's how the code looks.

例如，选项字符串ab：表示调用程序已知两个选项：- a和-b，- b后的下一个单词是补充参数。

youdao