编辑“︁C++ 字符串搜索”︁（章节）

==== 示例 ====

<syntaxhighlight lang="cpp">
#include <iostream>
#include <string>

int main() {
    std::string str = "C++ programming is fun!";
    std::string vowels = "aeiouAEIOU";

    // 查找第一个元音字母
    size_t found = str.find_first_of(vowels);
    if (found != std::string::npos) {
        std::cout << "First vowel found at position: " << found << std::endl;
    }

    // 查找第一个非字母字符
    found = str.find_first_not_of("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ");
    if (found != std::string::npos) {
        std::cout << "First non-alphabetic character found at position: " << found << std::endl;
    }

    return 0;
}
</syntaxhighlight>

输出：
<pre>
First vowel found at position: 1
First non-alphabetic character found at position: 3
</pre>