vehicle.cpp

#include <iostream>
#include <fstream>

using namespace std;

class Vehicle
{
protected:
    unsigned int capacity, mileage, id;
    string vname, vtype, cname;

public:
    void gatherData()
    {
        cout << "Name of the Vehicle: ";
        cin >> vname;
        cout << "\nType of the Vehicle: ";
        cin >> vtype;
        cout << "\nCompany Name of the Vehicle: ";
        cin >> cname;
        cout << "\nCapacity of the Vehicle(in cc): ";
        cin >> capacity;
        cout << "\nMileage of the Vehicle (in Kmpl): ";
        cin >> mileage;
        id++;
    }

    void displayData()
    {
        fstream file;
        cout << "\nAll Vehicles";
        file.open("vehicle.txt", ios::in);
        if (!file)
            cout << "\n\nFile Opening Error!";
        else
        {

            cout << "\n\n\nV_ID\tName"
                 << "\tCompany\tType"
                 << "\tCapacity\tMileage\n\n";
            file >> id >> vname;
            file >> cname >> vtype;
            file >> capacity >> mileage;
            while (!file.eof())
            {
                cout << " " << id
                     << "\t" << vname
                     << "\t" << cname
                     << "\t" << vtype
                     << "\t" << capacity
                     << "\t\t" << mileage
                     << "\n\n";
                file >> id >> vname;
                file >> cname >> vtype;
                file >> capacity >> mileage;
            }
            file.close();
        }
    }

    void write()
    {
        ofstream write;
        write.open("vehicle.txt", ios::app);
        if (!write)
        {
            cout << "\nFile could not be found or File could not be created.";
        }
        else
        {
            cout << "\nWriting Data to File...\n";
            write << id << " " << vname << " " << cname << " " << vtype << " " << capacity << " " << mileage << " "
                  << "Abhishek" << endl;
            write.close();
            cout << "Data has been exported to file named vehicle.txt";
        }
    }
    void updateData()
    {
        unsigned int capacity_c, mileage_c, vid, flag = 0, choice;
        string vname_c, vtype_c, cname_c;
        ofstream write;
        ifstream read;
        cout << "\n\nUpdate Vehicle Record";
        write.open("temp.txt", ios::app);
        read.open("vehicle.txt");

        if (!read)
        {
            cout << "\nFile could not be found or File could not be created.";
        }
        else
        {
            cout << "\nVehicle ID: ";
            cin >> vid;
            read >> id;
            read >> vname;
            read >> cname;
            read >> vtype;
            read >> capacity;
            read >> mileage;

            while (!read.eof())
            {
                if (vid != id)
                {
                    write << id << " " << vname << " " << cname << " " << vtype << " " << capacity << " " << mileage << endl;
                }
                else
                {
                    cout << "\nVehicle Name           ----->(1)";
                    cout << "\nVehicle Company Name   ----->(2)";
                    cout << "\nVehicle Type           ----->(3)";
                    cout << "\nCapacity               ----->(4)";
                    cout << "\nMileage                ----->(5)";
                    cout << "\nWhat would you like to modify? ";
                    cin >> choice;
                    if (choice == 1)
                    {
                        cout << "\nEnter New Vehicle Name: ";
                        cin >> vname_c;
                        write << id << " " << vname_c << " " << cname << " " << vtype << " " << capacity << " " << mileage << endl;
                    }
                    else if (choice == 2)
                    {
                        cout << "\nEnter New Vehicle Company Name: ";
                        cin >> cname_c;
                        write << id << " " << vname << " " << cname_c << " " << vtype << " " << capacity << " " << mileage << endl;
                    }
                    else if (choice == 3)
                    {
                        cout << "\nEnter New Vehicle Type: ";
                        cin >> vtype_c;
                        write << id << " " << vname << " " << cname << " " << vtype_c << " " << capacity << " " << mileage << endl;
                    }
                    else if (choice == 4)
                    {
                        cout << "\nEnter New Vehicle Capacity: ";
                        cin >> capacity_c;
                        write << id << " " << vname << " " << cname << " " << vtype << " " << capacity_c << " " << mileage << endl;
                    }
                    else if (choice == 5)
                    {
                        cout << "\nEnter New Vehicle Mileage: ";
                        cin >> vname_c;
                        write << id << " " << vname << " " << cname << " " << vtype << " " << capacity << " " << mileage_c << endl;
                    }
                    else
                    {
                        cout << "\nInvalid Input. Please Try Again.";
                    }
                    flag++;
                }
                read >> id;
                read >> vname;
                read >> cname;
                read >> vtype;
                read >> capacity;
                read >> mileage;
            }
            if (flag == 0)
            {
                cout << "\nVehicle ID not found.";
            }
        }

        cout << endl;
        write.close();
        read.close();
        remove("vehicle.txt");
        rename("temp.txt", "vehicle.txt");
    }
    void deleteData()
    {
        fstream file, file1;
        int found = 0;
        int VNum;
        cout << "\nDelete Vehicle Details." << endl;

        file.open("vehicle.txt", ios::in);
        if (!file)
        {
            cout << "\nFile Not Found.";
            file.close();
        }
        else
        {
            cout << "\nVehicle ID:  ";
            cin >> VNum;
            file1.open("temp.txt", ios::app | ios::out);
            file >> id >> vname >> cname >> vtype >> capacity >> mileage;
            while (!file.eof())
            {
                if (VNum != id)
                {
                    file1 << " " << id << " " << vname << " " << cname << " " << vtype << " " << capacity << " " << mileage << "\n";
                }
                else
                {
                    found++;
                    cout << "\nVehicle Data has been deleted successfully.";
                }
                file >> id >> vname >> cname >> vtype >> capacity >> mileage;
            }
            if (found == 0)
            {
                cout << "\nVehicle ID not found.";
            }
            file1.close();
            file.close();
            remove("vehicle.txt");
            rename("temp.txt", "vehicle.txt");
        }
    }
};

int main()
{
    Vehicle execute;
    int loop = 0, a;
    while (loop == 0)
    {
        cout << "\n=-=-=-=-=-=TSDL Vehicle Database=-=-=-=-=-=";
        cout << "\nAdd Data    ----->(1)";
        cout << "\nView Data   ----->(2)";
        cout << "\nModify Data ----->(3)";
        cout << "\nDelete Data ----->(4)";
        cout << "\nExit        ----->(0)";
        cout << "\nWhat would you like to do?: ";
        cin >> a;

        if (a == 1)
        {
            execute.gatherData();
            execute.write();
        }
        else if (a == 2)
        {
            execute.displayData();
        }
        else if (a == 3)
        {
            execute.updateData();
        }
        else if (a == 4)
        {
            execute.deleteData();
        }
        else if (a == 0)
        {
            break;
        }
        else
        {
            cout << "\nInvalid Choice. Please Try again.";
        }
    }
}