// File iosflags.cpp

#include <iostream>
#include <fstream>
#include <iomanip>
#include <cstdlib>
using namespace std;

int main()
{
    char x;

    // Print IO status flags.
    cout << "IO Status Flags" << endl;
    cout << hex << setw(4) << ios::badbit << " ";
    cout << hex << setw(4) << ios::failbit << " "; 
    cout << hex << setw(4) << ios::eofbit << " "; 
    cout << hex << setw(4) << ios::goodbit <<
            endl << endl;

    // Input file is in project folder.
    fstream fin;
    fin.open("testfile.txt", ios::in);

    // Check if open was successful.
    cout << boolalpha << fin.fail() << endl;

    // Check state flags.
    cout << fin.rdstate() << endl;

    // Set base back to decimal.
    cout << dec;

    // Show file output when opened as text file.
    cout << endl;
    cout << "File when opened as text." << endl;

    while((x = fin.get()) != EOF)
    {
        cout << x << " ";
        cout << setw(3) << right << 
                static_cast<int>(x) << " ";
    }
    cout << endl;

    // Close file so we can reopen later.
    fin.close();

    // Clear eof flag so we can reopen file.
    fin.clear();

    // Open file as binary.
    fin.open("testfile.txt", ios::in | ios::binary);

    // Repeat file output when opened as binary.
    cout << endl;
    cout << "File when opened as binary." << endl;
    while((x = fin.get()) != EOF)
    {
        cout << x << " ";
        cout << setw(3) << right << 
                static_cast<int>(x) << " ";
    }
    cout << endl << endl;
 
    // Print file mode flags.
    cout << "File Mode Flags" << endl;
    cout << hex << setw(4) << ios::app << " ";
    cout << hex << setw(4) << ios::ate << " "; 
    cout << hex << setw(4) << ios::binary << " "; 
    cout << hex << setw(4) << ios::in << " "; 
    cout << hex << setw(4) << ios::out << " "; 
    cout << hex << setw(4) << ios::trunc <<
            endl << endl;

    // Print seek offset flags.
    cout << "Seek Offset Flags" << endl;
    cout << hex << setw(4) << ios::end << " "; 
    cout << hex << setw(4) << ios::cur << " ";
    cout << hex << setw(4) << ios::beg << 
            endl << endl;

    return EXIT_SUCCESS;
}

// Output:
// IO Status Flags
//    4    2    1    0
//
// false
// 0
//
// File when opened as text.
// T  84 h 104 i 105 s 115    32 i 105 s 115
//   10 a  97    32 t 116 e 101 s 115 t 116 .  46
//   10

// File when opened as binary.
//   13  h 104 i 105 s 115    32 i 105 s 115
//   13 a  97    32 t 116 e 101 s 115 t 116 .  46
//   10

// File Mode Flags
//    8    4   20    1    2   10
//
// Seek Offset Flags
//    2    1    0