如何检查字符数组中是否存在特定字符

#include<iostream>
#include<string>

bool checkCharacter(const std::string& str, char target) {
    for (char c : str) {
        if (c == target) {
            return true;
        }
    }
    return false;
}

int main() {
    std::string str = "hello world";
    char target = 'w';
    if (checkCharacter(str, target)) {
        std::cout << "Target character "<< target << " exists in the string."<< std::endl;
    } else {
        std::cout << "Target character "<< target << " does not exist in the string."<< std::endl;
    }
    return 0;
}