std:string:npos
时间: 2023-09-12 21:11:53 浏览: 55
`std::string::npos`是一个`size_type`类型的常量,其值等于`size_type`类型可以表示的最大值。 这个常量通常用于字符串查找或截取等操作中作为结束位置的标记。 在`std::string`中,当使用一些查找或截取函数时,如果找不到匹配的子字符串或字符,那么返回值就会是`std::string::npos`。<span class="em">1</span><span class="em">2</span><span class="em">3</span><span class="em">4</span>
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