failure.cpp

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#include <iostream>
#include <stdexcept>
 
#include <examples.h>
 
 
#ifndef _RWSTD_NO_EXCEPTIONS
 
int main ()
{
    const std::ios::iostate allbits =
        std::ios::badbit | std::ios::eofbit | std::ios::failbit;
                
    // Enable all exceptions in cin.
    std::cin.exceptions (allbits);
 
    while (!std::cin.eof ()) {
 
        // Clear state bits.
        std::cin.clear ();
 
        try {
            short i;
            char  ch;
 
            // Try to extract a character and an integer.
            std::cin >> ch >> i;
 
            std::cout << ch << ' ' << i << '\n';
        }
 
#ifndef _RWSTD_NO_EXT_FAILURE
 
        // Classes badbit_set, eofbit_set, and failbit_set are
        // derived from failure and are optional extensions of
        // this implementation.
 
        catch (const std::ios::badbit_set &e) {
            std::cout << "Caught std::ios::badbit_set: "
                      << e.what () << '\n';
        }
        catch (const std::ios::eofbit_set &e) {
            std::cout << "Caught std::ios::eofbit_set: "
                      << e.what () << '\n';
        }
        catch (const std::ios::failbit_set &e) {
            std::cout << "Caught std::ios::failbit_set: "
                      << e.what () << '\n';
        }
 
#endif   // _RWSTD_NO_EXT_FAILURE
 
        catch (const std::ios::failure &e) {
            std::cout << "Caught std::ios::failure: "
                      << e.what () << '\n';
        }
        catch (const std::exception &e) {
            std::cout << "Caught std::exception: "
                      << e.what () << '\n';
 
            return 1;   // Indicate error.
        }
        catch (...) {
            std::cout << "Caught an unknown exception\n";
 
            return 1;   // Indicate error.
        }
    }
 
    return 0;
}
 
#else   // if defined (_RWSTD_NO_EXCEPTIONS)
 
int main ()
{
    std::cout << "Exceptions not supported\n";
 
    return 0;
}
 
 
#endif   // _RWSTD_NO_EXCEPTIONS