i/o condition states ( ios::badbit, goodbit, eofbit, failbit && std::cin.bad(), good(), eof(), fail() )

io.cpp

#include <iostream> /// std::cout; std::endl;

int main ()
{

   int i = 0;

   std::cin >> i; /// inserting some data into the stream and returns a state return by input operator(insertion operetor)

   if (std::cin.rdstate() == std::cin.badbit) /// checks the following conditions
       std::cout << "bad bit " << std::endl;
   else if (std::cin.rdstate() == std::cin.goodbit)
       std::cout << "good bit " << std::endl;
   else if (std::cin.rdstate() == std::cin.eofbit)
       std::cout << "eof bit " << std::endl;
   else if (std::cin.rdstate() == std::cin.failbit) { /// if the condition of the stream is not that fatal then bypassing it
       std::cout << "fail bit bypassing the stream" << std::endl;
       std::cin.clear ();
        if (std::cin.rdstate() == std::cin.goodbit)
            std::cout << "good bit" << std::endl;
            else
                std::cout << "Bad bit " << std::endl;
        } else {
            std::cout << "no input" << std::endl;
        }

    return 0;
}