Structs

[Jack599]

This code intends to output a selection of the snack a user chooses along with the price and change owed by a vending machine. I need it to subtract one from the inventory of the item selected and I intend to do that (line 54) but nothing happens. If anyone has any clue as to what to do to fix this then that would be great.

#include <string>
#include <iostream>

using namespace std;

struct Snack
{
    string name;
    double cost;
    int inventory;
};

int main()
{
    string snack;
    struct Snack vendor[4] = {
        {"Oreo Cookie Package", 0.75, 25},
        {"Granola Bars", 0.80, 30},
        {"Oatmeal Raisin Cookies", 0.75, 15},
        {"Tortilla Chips", 0.60, 20},
    };
    bool run = true;
    double profit = 0.00;
    while (run)
    {
        for (int i = 0; i < 4; i++)
        {
            if (vendor[i].inventory > 0)
            {
                cout << i+1 << ".  " << vendor[i].name << endl;
            }
        }
        int selection;
        cout << "Enter the number of the snack you would like to purchase.  If you are done, enter 0 to quit: " << endl;
        cin >> selection;
        if (selection == 0)
            run = false;
        double payment;
        cout << "Your snack costs $" << vendor[selection - 1].cost << ".  Please enter at least as much as your snack costs, but no more than $5.00: " << endl;
        cin >> payment;
        while (payment<vendor[selection - 1].cost || payment>5.00)
        {
            cout << "You have not entered a valid amount.  Please try again: " << endl;
            cin >> payment;
        }
        profit += vendor[selection - 1].cost;
        cout << "Your change is: " << payment - vendor[selection - 1].cost << endl;
        cout << "" << endl;
        vendor[selection - 1].inventory --;
    }
    cout << "Your total money made is: $" << profit << endl;
    for (int i = 0; i < 4; i++)
    {
        cout << "There are " << vendor[i].inventory << " " << vendor[i].name << "'s remaining";
    }
    return 0;
}

[Jack599]

This is what it outputs but I would like it to say something like (Inventory remaining: "number remaining here"

1.  Oreo Cookie Package
2.  Granola Bars
3.  Oatmeal Raisin Cookies
4.  Tortilla Chips
Enter the number of the snack you would like to purchase.  If you are done, enter 0 to quit: 
1
Your snack costs $0.75.  Please enter at least as much as your snack costs, but no more than $5.00: 
5.00
Your change is: 4.25

[adam2016]

I think I see your problem,

the problem is you are not breaking out of the loop if the user enters 0. So if the user enters 0 run now equals false but more code comes after this so instead break out of the loop if the user enters 0.

*edit if you want it to display "Inventory remaining number remaining" just put your for loop inside your main while loop

 for (int i = 0; i < 4; i++)
    {
        cout << "There are " << vendor[i].inventory << " " << vendor[i].name << "'s remaining"; 
    }

// place this inside main while loop

#include <string>
#include <iostream>

using namespace std;

struct Snack
{
    string name;
    double cost;
    int inventory;
};

int main()
{
    string snack;
    struct Snack vendor[4] = {
        {"Oreo Cookie Package", 0.75, 25},
        {"Granola Bars", 0.80, 30},
        {"Oatmeal Raisin Cookies", 0.75, 15},
        {"Tortilla Chips", 0.60, 20},
    };
    double profit = 0.00;
    while (true) // change here
    {
        for (int i = 0; i < 4; i++)
        {
            if (vendor[i].inventory > 0)
            {
                cout << i+1 << ".  " << vendor[i].name << endl;
            }
        }
        int selection;
        cout << "Enter the number of the snack you would like to purchase.  If you are done, enter 0 to quit: " << endl;
        cin >> selection;
        if (selection == 0)
            break; // change here
        double payment;
        cout << "Your snack costs $" << vendor[selection - 1].cost << ".  Please enter at least as much as your snack costs, but no more than $5.00: " << endl;
        cin >> payment;
        while (payment<vendor[selection - 1].cost || payment>5.00)
        {
            cout << "You have not entered a valid amount.  Please try again: " << endl;
            cin >> payment;
        }
        profit += vendor[selection - 1].cost;
        cout << "Your change is: " << payment - vendor[selection - 1].cost << endl;
        cout << "" << endl;
        vendor[selection - 1].inventory --;
    }
    cout << "Your total money made is: $" << profit << endl;
    for (int i = 0; i < 4; i++)
    {
        cout << "There are " << vendor[i].inventory << " " << vendor[i].name << "'s remaining";
    }
    return 0;
}