Question

c ++：我可以使用.find函数在字符串中查找多个字符吗？例如：在线性方程组中寻找+和-

Answer 1

一种实现方式：

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https://en.cppreference.com/w/cpp/algorithm/find

您还可以使用std :: strpbrk，它在字符串中搜索一个或多个分隔符。 https://en.cppreference.com/w/cpp/string/byte/strpbrk

根据您要对字符串进行标记化的注释，std :: strtok将完成此工作：

auto it = std::find_if( str.begin(), str.end(), [](char c){
    return c == '+' || c == '-';
} );

https://en.cppreference.com/w/cpp/string/byte/strtok

警告：上面的代码不是线程安全的。

C ++：我可以使用.find函数在字符串中查找多个元素

1 个答案: