regexsample.cpp

#include <iostream>
#include <string>
#include <regex>

int main()
{
    std::vector<std::string> test = {
        "Windows 8",
        "Windows8",
        "Microsoft Windows8",
        "MicrosoftWindows8",
        "Windows8.1",
        "MicrosoftWindows8.1",
        "Windows 8.1",
        "Windows 8.1 Update 1",
        "MicrosoftWindows8.1Update1",
        "Microsoft Windows 8.1 Update 1",
        "microsoft windows 8.1 update 1",
        "Microsoft windows 8.2 update 1",
    };
    std::regex pattern("([Mm]icrosoft)?\\s*([Ww]indows)\\s*(8\\.1)\\s*([Uu]pdate)?.*");
    std::smatch sm;
    int line = 1;
    for (auto it = test.begin(); it != test.end(); ++it)
    {
        if (std::regex_match(*it, sm, pattern))
        {
            std::cout << line << "個目の ["
                << sm[0] << "] がマッチしました\n";
        }
        line++;
    }
    return 0;
}