在使用"any_of“时，如何检查字符串是否没有特定的符号？

#include <iostream>
#include <string>
#include <algorithm>

bool checkSymbol(const std::string& str) {
    std::string symbols = "@#$";
    return std::any_of(str.begin(), str.end(), [&](char c) {
        return symbols.find(c) == std::string::npos;
    });
}

int main() {
    std::string input;
    std::cout << "Enter a string: ";
    std::cin >> input;

    if (checkSymbol(input)) {
        std::cout << "The string does not contain the specified symbols." << std::endl;
    } else {
        std::cout << "The string contains at least one of the specified symbols." << std::endl;
    }

    return 0;
}