C++ 代码 获取匹配的字符串数组或替换

#include <regex>
#include <string>
   // 使用类 std::regex_iterator 来进行多次搜索.
    static std::string _strs = "... ..." ; 
    std::regex _regex("<img [^>]+>");
    std::cout << "sregex_iterator ====" << std::endl;
    auto words_begin =
        std::sregex_iterator(_strs.begin(), _strs.end(), _regex);
    auto words_end = std::sregex_iterator();
    for (std::sregex_iterator i = words_begin; i != words_end; ++i)
    {
        std::smatch match = *i;                                                 
        std::string match_str = match.str();
        std::cout << match_str << '\n';
}

// 把所有 img src 的绝对路径替换为 images 开始的相对路径.使用分组即可.
    std::regex img_regex("(<img [^>]*src=[\"']{1})([^\"']*)\\\\(images\\\\[^\"']*[\"']{1}[^>]*>)");
    std::smatch color_match;
    std::string rep = "$1$3";
    std::string tmp = std::regex_replace(kHtmlSnippet,img_regex,rep);
    std::cout << tmp << std::endl;
    
    
    获取以-成对的字符串
\w+\s*-(\s*[^,;]+)
样本:
fsd-fsdfs fds-fsdfs,werfsd-fewrwrw;fewrwer,fdf  -fdf fsdew- fd90
匹配结果:
fsd-fsdfs
fds-fsdfs
werfsd-fewrwrw
fdf  -fdf
fsdew- fd90
另一小例
[^,"]+|,,|(?:"[^,"]*"[^"]*"[^"]*)"|"(?:[^"])*"
样本: your dollors,10000, 27 years old ,,"10,000","it is "10 Grand",baby",10k
匹配结果: your dollors 10000  27 years old  ,,   "10,000"   "it is "10 Grand",baby"   10k