add phone

void Admin::Add_phone()
{
    cout<<"Enter The Types of Phone You want to Add"<<endl;
    cout<<"1.Featured phone"<<endl;
    cout<<"2.Midranged phone"<<endl;
    cout<<"3.Flagship phone"<<endl;
    cout<<"4.Appple Phone"<<endl;
    cout<<"0.Exit"<<endl;
    int choice;
    while(true)
    {
        cout<<"Enter Your choice"<<endl;
        cin>>choice;
        if(choice==1)
        {
            fstream fin;
            fin.open("Featuredphone.csv",ios::in|ios::app);
            vector<string>row;
            string brand;
            int price;
            int battery;
            cout<<"Enter Model Name"<<endl;
            cin>>brand;
            cout<<"Enter Price"<<endl;
            cin>>price;
            cout<<"Enter battery Capacity"<<endl;
            cin>>battery;
            fin<<brand<<","<<price<<","<<battery<<endl;
            fin.close();
        }
        if(choice==2)
        {
            fstream fin;
            fin.open("Midrangedphone.csv",ios::in|ios::app);
            string brand,networktype,displaytype,displaysize;
            string battery;
            string simtype,platform;
            string ram,rom;
            string price;
            string  camera;
            string android_version,extmemory;
            cout<<"Enter the Name of Brand"<<endl;
            cin>>brand;
            cout<<"Enter The Details Below"<<endl;
            cout<<"battery"<<endl;
            cin>>battery;
            cout<<"Networktype"<<endl;
            cin>>networktype;
            cout<<"Display type and Displaysize"<<endl;
            cin>>displaytype>>displaysize;
            cout<<"Sim type"<<endl;
            cin>>simtype;
            cout<<"Platform"<<endl;
            getline(cin,platform);
            cout<<"Ram and Rom"<<endl;
            cin>>ram>>rom;
            getchar();
            cout<<"Enter Camera Details"<<endl;
            getline(cin,camera);
            cout<<"Android Version"<<endl;
            cin>>android_version;
            cout<<"External Memory"<<endl;
            cin>>extmemory;
            cout<<"Enter the price"<<endl;
            cin>>price;
            fin<<brand<<","<<price<<","<<ram<<","<<rom<<","<<battery<<","<<camera<<","<<networktype<<","<<displaytype<<","<<displaysize<<","
            <<simtype<<","<<platform<<","<<android_version<<","<<extmemory<<endl;
            fin.close();
        }
        else if(choice==3)
        {
            fstream fin;
            fin.open("Flagship_phone.csv",ios::in|ios::app);
            string brand,battery,networktype,displaytype,displaysize;
            string simtype,platform;
            string ram,rom;
            string price;
            string  camera;
            string android_version,extmemory;
            cout<<"Enter the Name of Brand"<<endl;
            cin>>brand;
            cout<<"Enter The Details Below"<<endl;
            cout<<"battery"<<endl;
            cin>>battery;
            cout<<"Networktype"<<endl;
            cin>>networktype;
            cout<<"Display type and Displaysize"<<endl;
            cin>>displaytype>>displaysize;
            cout<<"Sim type"<<endl;
            cin>>simtype;
            cout<<"Platform"<<endl;
            getline(cin,platform);
            cout<<"Ram and Rom"<<endl;
            cin>>ram>>rom;
            getchar();
            cout<<"Enter Camera Details"<<endl;
            getline(cin,camera);
            cout<<"Android Version"<<endl;
            cin>>android_version;
            cout<<"External Memory"<<endl;
            cin>>extmemory;
            cout<<"Enter the price"<<endl;
            cin>>price;
           fin<<brand<<","<<price<<","<<ram<<","<<rom<<","<<battery<<","<<camera<<","<<networktype<<","<<displaytype<<","<<displaysize<<","
            <<simtype<<","<<platform<<","<<android_version<<","<<extmemory<<endl;
            fin.close();
        }
        else if(choice==4)
        {
            fstream fin;
            fin.open("Applephone.csv",ios::in|ios::app);
            string battery,brand,networktype,displaytype,displaysize;
            string simtype,platform;
            string ram,rom;
            string price;
            string  camera;
            cout<<"Enter The Details Below"<<endl;
            cout<<"battery"<<endl;
            cin>>battery;
            brand="Apple";
            cout<<"Networktype"<<endl;
            cin>>networktype;
            cout<<"Display type and Displaysize"<<endl;
            cin>>displaytype>>displaysize;
            cout<<"Sim type"<<endl;
            cin>>simtype;
            cout<<"Platform"<<endl;
            getline(cin,platform);
            cout<<"Ram and Rom"<<endl;
            cin>>ram>>rom;
            getchar();
            cout<<"Enter Camera Details"<<endl;
            getline(cin,camera);
            cout<<"Enter the price"<<endl;
            cin>>price;
           fin<<brand<<","<<price<<","<<ram<<","<<rom<<","<<battery<<","<<camera<<","<<networktype<<","<<displaytype<<","<<displaysize<<","
            <<simtype<<","<<platform<<endl;
            fin.close();
        }
        else if(choice==0)
        {
            break;
        }
        else
        {
            continue;
        }
    }
}