// fig19_19.cpp 
// Testing error states.
#include <iostream>

int main() {
   int integerValue{0};

   // display results of cin functions
   std::cout << std::boolalpha << "Before a bad input operation:"
      << "\ncin.rdstate(): " << std::cin.rdstate()
      << "\n    cin.eof(): " << std::cin.eof()
      << "\n   cin.fail(): " << std::cin.fail()
      << "\n    cin.bad(): " << std::cin.bad() 
      << "\n   cin.good(): " << std::cin.good()
      << "\n\nExpects an integer, but enter a character: ";

   std::cin >> integerValue; // enter character value

   // display results of cin functions after bad input
   std::cout << "\nAfter a bad input operation:"
      << "\ncin.rdstate(): " << std::cin.rdstate()
      << "\n    cin.eof(): " << std::cin.eof() 
      << "\n   cin.fail(): " << std::cin.fail()
      << "\n    cin.bad(): " << std::cin.bad()
      << "\n   cin.good(): " << std::cin.good();

   std::cin.clear(); // clear stream

   // display results of cin functions after clearing cin
   std::cout << "\n\nAfter cin.clear()" 
      << "\ncin.fail(): " << std::cin.fail()
      << "\ncin.good(): " << std::cin.good() << "\n";
} 


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