need help with code

[midnight hawk]

#include <iostream>
#include <fstream>

using namespace std;

class Sandwich {
public:
string name;
int price;
};

class Extra {
public:
string name;
int price;
};

class Drink {
public:
string name;
int price;
};

class Shop {
public:
Sandwich sandwich;
Extra extra;
Drink drink;
string username, password;
bool state;
int counter;

void showWelcomeMessage() {
    cout << "Welcome to the Sandwich Shop!" << endl;
}

void buyNewItem() {
    Sandwich newSandwich[20];

    newSandwich[counter].name = sandwich.name;
    newSandwich[counter].price = sandwich.price;

    Extra newExtra[20];

    newExtra[counter].name = extra.name;
    newExtra[counter].price = extra.price;

    Drink newDrink[20];

    newDrink[counter].name = drink.name;
    newDrink[counter].price = drink.price;

    cout << "You have purchased:" << endl;
    cout << "Sandwich: " << newSandwich[counter].name << " - Price: " << newSandwich[counter].price << "EGP" << endl;
    cout << "Extra: " << newExtra[counter].name << " - Price: " << newExtra[counter].price << "EGP" << endl;
    cout << "Drink: " << newDrink[counter].name << " - Price: " << newDrink[counter].price << "EGP" << endl;
    counter++;
}

[jagged hedge]

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[midnight hawk]

int main() {
string sandwiches[] = {"Chicken Shawarma", "Beef Shawarma", "Chicken Burger", "Beef Burger", "Sausage"};
float sandwichPrices[] = {25, 35, 12, 16, 10};
string extras[] = {"Extra Fries", "Extra Cheese", "Extra Mayo", "None"};
float extraPrices[] = {5, 8, 4, 0};
string drinks[] = {"Pepsi – Can", "Pepsi – Bottle", "Juice", "None"};
float drinkPrices[] = {10, 15, 8, 0};
bool state;

int selectedSandwichIndex, selectedExtraIndex, selectedDrinkIndex;
Shop myApp;

myApp.showWelcomeMessage();

state = myApp.login();

while (state) {
    myApp.showItemsWithPrices("Sandwiches", sandwiches, sandwichPrices, 5);
    selectedSandwichIndex = myApp.getUserInput("Select Sandwich: ");

    myApp.showItemsWithPrices("Extras", extras, extraPrices, 4);
    selectedExtraIndex = myApp.getUserInput("Select Extra: ");

    myApp.showItemsWithPrices("Drinks", drinks, drinkPrices, 4);
    selectedDrinkIndex = myApp.getUserInput("Select Drink: ");

    myApp.sandwich.name = sandwiches[selectedSandwichIndex - 1];
    myApp.sandwich.price = sandwichPrices[selectedSandwichIndex - 1];

    myApp.extra.name = extras[selectedExtraIndex - 1];
    myApp.extra.price = extraPrices[selectedExtraIndex - 1];

    myApp.drink.name = drinks[selectedDrinkIndex - 1];
    myApp.drink.price = drinkPrices[selectedDrinkIndex - 1];

    myApp.buyNewItem();

    cout << "Buy Another Item? [1=Yes - 0=No]: ";
    cin >> state;
}

if (myApp.calculateGrandTotal(1, 1, 1) > 0) {
    myApp.saveInvoiceDetailsAsTextFile();
    myApp.saveInvoiceDetailsAsCSVFile();
}
else {
    cout << "Invalid username or password" << endl;
}

return 0;

}

in this if (myApp.calculateGrandTotal(1, 1, 1) > 0) {
myApp.saveInvoiceDetailsAsTextFile();
myApp.saveInvoiceDetailsAsCSVFile();
}
else {
cout << "Invalid username or password" << endl;
}
i dont want to use the (1,1,1)