以不同的方式替换每一项，正则表达式c++

#include <iostream>
#include <regex>

int main() {
    std::string str = "Hello, World!";
    std::regex regex("Hello.*");
    
    if (std::regex_match(str, regex)) {
        std::cout << "Matched!" << std::endl;
    } else {
        std::cout << "Not matched!" << std::endl;
    }
    
    return 0;
}

#include <iostream>
#include <regex>

int main() {
    std::string str = "The quick brown fox jumps over the lazy dog.";
    std::regex regex("fox.*");
    
    std::smatch match;
    if (std::regex_search(str, match, regex)) {
        std::cout << "Matched: " << match.str() << std::endl;
    } else {
        std::cout << "Not matched!" << std::endl;
    }
    
    return 0;
}

#include <iostream>
#include <regex>

int main() {
    std::string str = "Hello, World!";
    std::regex regex("World");
    
    std::string replaced = std::regex_replace(str, regex, "C++");
    std::cout << "Replaced: " << replaced << std::endl;
    
    return 0;
}