what is wrong with my global var getting wrong or weird numbers for inventory function?

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#include <iostream>
using namespace std;

//global variables
int MONEY = 1000; //initial money
int MEDKIT = 0, LIGHTER =0, KNIFE =0, FOOD =0, WEAPON =0, CLOTHING =0, ROPE =0, TENT =0, COMPASS =0;//items amounts


class store
{
public:
    string name;
    string desc; //decription
    int price;
    void stat(int price, int item); // display item information
    void amount(int price, int item);
    void storeMenu(int item); //display menu of items and options
    void inventory();
    store();
    ~store();
}medkit, lighter, knife, food, weapon, clothing, rope, tent, compass, menu;

store::store()//constructor
{

}

store::~store()//destructor
{

}

void store::stat(int price, int item)
{
    cout << "**********" <<endl;
    cout << "Name: \t" << name <<endl;
    cout << "Price \t$" << price <<endl;
    cout << "Description: " << desc <<endl;
    cout << "**********" <<endl <<endl;
    amount(price, item);

}

void store::amount(int price, int item)
{
        cout << "How many would you like to purchase?"<<endl;

        int amt;
        cin >> amt;


        if(MONEY < (price * amt))//not enough money, will * choiceamount and value before comparing with money
        {
            cout << endl <<endl;
            cout << "**********You do not have enough money!**********"<<endl<<endl;

            storeMenu(item);
        }
        else
        {
            MONEY -= (price * amt);
            item += amt;//store amount and put into variable for future inventory

                storeMenu(item);
        }

}

void store::storeMenu(int item)
{
    char choice;//needs to be char for choices cuz of '1'

    //display money amount
    cout << "**************" <<endl;
    cout << "  Money $" << MONEY <<endl;
    cout << "**************" <<endl <<endl;


    cout << "Choose which supply you would like to purchase" << endl;
    cout << "E) ***Exit Menu***"  <<endl<<endl;

    cout << "1) Medkit" << endl;
    cout << "2) Lighter" << endl;
    cout << "3) Knife" << endl;
    cout << "4) Food" <<endl;
    cout << "5) Weapons" << endl;
    cout << "6) Clothing" << endl;
    cout << "7) Rope" << endl;
    cout << "8) Tent" <<endl;
    cout << "9) Compass" << endl<<endl;

    cin >> choice;


        if(choice == '1')//choice for items
            medkit.stat(price = 100, MEDKIT += item);

        if(choice == '2')
            lighter.stat(price = 50,  LIGHTER += item);

        if(choice == '3')
            knife.stat(price = 100, KNIFE += item);

        if(choice == '4')
            food.stat(price = 150, FOOD += item);

        if(choice == '5')
            weapon.stat(price = 150,  WEAPON += item);

        if(choice == '6')
            clothing.stat(price = 50, CLOTHING += item);

        if(choice == '7')
            rope.stat(price = 25, ROPE += item);

        if(choice == '8')
            tent.stat(price = 300, TENT += item);

        if(choice == '9')
            compass.stat(price = 50, COMPASS += item);

        if(choice == 'e' ||choice == 'E')
                {
                        inventory();
                }//end of choice exit
}//end store function

void store::inventory()
{
        cout << "****INVENTORY****"<<endl;
        cout << "Money $" <<"\t\t"<< MONEY <<endl;
        cout << "Medkits: " <<"\t"<< MEDKIT <<endl;
        cout << "Lighters: "<<"\t" << LIGHTER <<endl;
        cout << "Knives: "<<"\t" << KNIFE <<endl;
        cout << "Food: "<<"\t\t" << FOOD <<endl;
        cout << "Weapons: "<<"\t" << WEAPON <<endl;
        cout << "Clothing: "<<"\t" << CLOTHING <<endl;
        cout << "Rope: "<<"\t\t" << ROPE <<endl;
        cout << "Tent: "<<"\t\t" << TENT <<endl;
        cout << "Compass: "<<"\t" << COMPASS <<endl<<endl;
}//end inventory()

int main(int item)
{

    medkit.name = "Medical Kit";
    medkit.price = 100;
    medkit.desc = "A medkit will heal your party's wounds. ";

    lighter.name = "Lighter";
    lighter.price = 50;
    lighter.desc = "A lighter will provide you with fire. ";

    knife.name = "Knife";
    knife.price = 100;
    knife.desc = "A knife will provide you will a valuable tool as well as a weapon. ";

    food.name = "Food";
    food.price = 150;
    food.desc = "Food is essential to surviving. ";

    weapon.name = "Weapon";
    weapon.price = 150;
    weapon.desc = "A weapon will provide you with strong protection. ";

    clothing.name = "Clothing";
    clothing.price = 50;
    clothing.desc = "Clothing will provide you protection from the weather. ";

    rope.name = "Rope";
    rope.price = 25;
    rope.desc = "Rope will provide you the ability to craft in the wilderness. ";

    tent.name = "Tent";
    tent.price = 300;
    tent.desc = "A tent will provide your party with shelter. ";

    compass.name = "Compass";
    compass.price = 50;
    compass.desc = "A compass will provide you with navigation. ";

    menu.storeMenu(item);

}//end main



int main(int item)

This is just wrong. If your compiler allows this, throw it away and get a C++ compiler.

Try int main()


That aside, what value does item have? Who knows, since you never set it to any value, but when you choose to buy something, you are buying item many of them. So how many are you buying?

don't initialize your global variables unless they're higher/lower than 0. They are predefined with that value since they're global.

Save yourself some time.
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