Stream Status

#include <fstream>
#include <iostream>
#include <string>

template <class T>
std::string check_status(std::basic_ios<T>& stream)
{
    if (stream.good()) {
        return "good";
    } else {
        std::string msg;

        if (stream.rdstate() & std::ios_base::failbit) {
            msg += "failbit";
        }

        if (stream.rdstate() & std::ios_base::eofbit) {
            msg += msg.empty() ? "eofbit" : ", eofbit";
        }

        if (stream.rdstate() & std::ios_base::badbit) {
            msg += msg.empty() ? "badbit" : ", badbit";
        }

        return msg + " set";
    }
}

int main(int argc, char const* argv[])
{
    std::ofstream ofs("test.in", std::ios::out);
    ofs << "hello";

    std::fstream ifs;
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());

    char ch = ifs.get();
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());
    printf("  --  ch = %x\n", (unsigned)ch);

    ifs.open("test.in", std::ios::in);
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());

    ifs.get();
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());
    printf("  --  ch = %x\n", (unsigned)ch);

    int num = 0;
    ifs >> num;
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());
    printf("  --  num = %d\n", num);

    ifs.clear();
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());

    ifs.close();
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());

    ch = ifs.get();
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());
    printf("  --  ch = %x\n", (unsigned)ch);

    ifs.open("test.in", std::ios::in);
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());

    std::string text;
    ifs >> text;
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());
    printf("  --  text = %s\n", text.c_str());

    ifs.clear();
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());

    ifs.put('0');
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());
    printf("  --  text = %s\n", text.c_str());

    ifs.close();
    printf("%d\t| %s\n", __LINE__, check_status(ifs).c_str());

    return 0;
}

#if 0
35      | good
38      | failbit, eofbit set
  --  ch = ffffffff
42      | good
45      | failbit, eofbit set
  --  ch = ffffffff
50      | failbit, eofbit set
  --  num = 0
54      | good
57      | good
60      | failbit, eofbit set
  --  ch = ffffffff
64      | good
68      | failbit, eofbit set
  --  text =
72      | good
75      | badbit set
  --  text =
79      | badbit set
#endif