#include <iostream>
#include <fstream>

using namespace std;

struct Terminal
{
    char TermType[5];
    char Building[3];
    int Rate;
    char Access;
    int mon, day, year;
}CompTerm;


int main(int argc, char* argv[])
{
    int TermNum;
    int ans = 1;

    fstream FileTerminal;

    while (1)
    {
        cout << "\n-----------------------------------------------------------------------\n";
        cout << "\n\t\tMain Menu";
        cout << "\n\n1) Enter new terminal Information?(new data will be added to existing data file)";
        cout << "\n2) Display information of specific terminal number? ";
        cout << "\n3) Display all stored information? ";
        cout << "\n4) Exit.";
        cout << "\n\nyour choice : ";
        cin >> ans;
        cout << "\n-----------------------------------------------------------------------\n";
        
        switch(ans)
        {
        case 1 : FileTerminal.open("c:/terminal.txt",ios::out|ios::binary|ios::app);
                if ( !FileTerminal )
                {
                    cout << "Error...cannot open file for writing...";
                    break;
                }

                cout << "\nTerminal Type : "; cin >> CompTerm.TermType;
                cout << "\nBuilding : "; cin >> CompTerm.Building;
                cout << "\nTransmission Rate : "; cin >> CompTerm.Rate;
                cout << "\nAccess Code : "; cin >> CompTerm.Access;
                cout << "\nDate of last acsess : ";
                cout << "\n\tmonth : ";cin >> CompTerm.mon;    
                cout << "\n\tday : "; cin >> CompTerm.day;
                cout << "\n\tyear : "; cin >> CompTerm.year;

                FileTerminal.write(reinterpret_cast<char *>(&CompTerm), sizeof(CompTerm));
                
                cout << "\n-----------------------------------------------------------------------\n";


                FileTerminal.close();

                break;

        case 2 : FileTerminal.open("c:/terminal.txt",ios::binary|ios::in);
                
                
                cout << "\nEnter the terminal number : ";
                cin >> TermNum;

                if ( TermNum < 1 || TermNum > 10)
                {
                    cout << "...error... wrong terminal number...";
                    break;
                }

                FileTerminal.seekg((TermNum-1)*sizeof(CompTerm));

                if(!FileTerminal.good( ) )
                {
                    if (!FileTerminal.eof( ))
                    {
                        cout << "\nError reading file.";
                        break;
                    }
                }

                FileTerminal.read(reinterpret_cast<char *>(&CompTerm), sizeof(CompTerm));
                cout <<"\nInformation for Terminal No "<< TermNum << "\n";
                cout << "\nTerminal Type : " << CompTerm.TermType
                     << "\nBuilding : " << CompTerm.Building
                     << "\nTransmission Rate : " << CompTerm.Rate
                     << "\nAccess Code : " << CompTerm.Access
                     << "\nDate of Last access (mm/dd/yyyy) : " << CompTerm.mon << "/" << CompTerm.day << "/" << CompTerm.year << "\n\n";
                    
                cout << "\n-----------------------------------------------------------------------\n";

                FileTerminal.close();
                system("Pause");
                break;

        case 3 : FileTerminal.open("c:/terminal.txt",ios::binary|ios::in);
                
                
                TermNum = 1;
                cout <<"\nTermNo Type TransRate Building AccessCode Date(mm/dd/yyyy)\n\n";
                while( TermNum <= 10)
                {
                    if(!FileTerminal.good( ) )
                    {
                        if (!FileTerminal.eof( ))
                        {
                            cout << "\nError reading file.";
                            break;
                        }
                        
                    }
                    FileTerminal.read(reinterpret_cast<char *>(&CompTerm), sizeof(CompTerm));
                    cout << TermNum << "\t" << CompTerm.TermType << "\t"<< CompTerm.Building << "\t"
                         << CompTerm.Rate << "\t" << CompTerm.Access << "\t"
                         << CompTerm.mon << "/" << CompTerm.day << "/" << CompTerm.year << "\n";

                    TermNum++;
                }

                cout << "\n-----------------------------------------------------------------------\n";

                FileTerminal.close();
                system("Pause");

                break;

        case 4 : exit(1);

        default : cout << "\n...wrong choice...choose again..."; continue;
        }
    }


    return 0;
}