Function not returning value

[Mebant]

Can someone help me find out why my function seatpurchase is not returning a value for me to use in another function. Once returned it is automatically 0. Please help my poor soul.... C++ till i die...

  #include <iostream>
#include <iomanip>


using namespace std;


const int COL = 30;


void write(char[][COL], int);
void display(char[][COL], int);
double Priceperrow(double [],int, int);
void availableseats(int, int, double, int);
int seatpurchase(char [][COL], int, int);
int seatpurchases(char [][COL], int, int);


int main()
{

    const int ROW = 15;
    char grid [ROW][COL];
    int answer = 0;
    double rowprices[ROW];
    int totalseats = ROW * COL;
    int purchaseforone = 0;
    int purchaseformany = 0;
    int priceforrow = 0;
    int purchase = 0;



    //screen clear u son of a bitch


    write (grid, ROW);
    display(grid, ROW);



        purchase = purchase + purchaseforone;

    do
    {


//Menu(answer);

        cout << "Welcome to the Theater Program" << endl;
        cout << endl;
        cout << "Menu" << endl;
        cout << endl;
        cout << "Are you a customer or a owner?" << endl;
        cout << "1.Customer" << endl
             << "2.Owner" << endl
             << "3.End" << endl;
        cin >> answer;




        if (answer == 1) //customer

        {
            cout << "Hello Customer" << endl;
            cout << endl;
            cout << "What would you like to do?" << endl;
            cout << "1.Purchase seats." << endl
                 << "2.Purchase Multiple seats" << endl
                 << "3.Program" << endl;
            cin >> answer;
            if (answer == 1) // purchase for seats
            {

                seatpurchase(grid, ROW, purchaseforone);
                cout << purchaseforone << endl;
This is the function that is not returning a value for me to use it inside available seats function.


            }

            else if (answer == 2) // multiple seats
            {
                seatpurchases(grid, ROW, purchaseformany);
            }

        }


        else if (answer == 2) // owner
        {
            cout << "Hello Owner" << endl;
            cout << endl;
            cout << "What would you like to do?" << endl;
            cout << "1.Price Input for seats." << endl
                 << "2.Show Availible Seats." << endl
                 << "3.End Program" << endl;
            cin >> answer;
            if (answer == 1) // price input for seats
            {
                Priceperrow(rowprices, ROW, priceforrow);
            }
            else if (answer == 2) // show availible seats
            {
                cout << purchaseforone << endl;

                availableseats(purchase,  purchaseformany ,rowprices[ROW] , totalseats);
            }

        }
        else if (answer == 3)
        {
            cout << "Goodbye" << endl;

            ;
            return 0;
        }



    }
    while (answer < 3);


    return 0;
}

void write(char grid [][COL], int rows)
{
    for(int x = 0; x<rows; x++)
    {
        for (int y = 0 ; y < COL; y++)
        {
            grid[x][y] = '#';
        }
    }

}

void display(char grid[][COL], int rows)
{
    int row = 1;
    cout <<"       123456789012345678901234567890" << endl;

    for(int x = 0; x<rows; x++)
    {
        cout  << "Row " << left << setw(3)<< row++;

        for (int y = 0 ; y < COL; y++)
        {
            cout << grid[x][y];
        }
        cout << endl;

    }

}

double Priceperrow(double ROW[], int row, int priceforrow)
{
    int numberofrow = 0;
    int rowcount = 0;
    double rowprice = 0;

    for( rowcount = 0; rowcount<row; rowcount++)
    {
        numberofrow++;
        cout << "Please Set the Price for Row " << numberofrow << endl;
        cin >> rowprice;

        ROW[rowcount] = rowprice;
        return ROW[rowcount];
    }

    return rowcount;
}

int seatpurchase(char ROWandColumn[][COL], int ROW, int Purchase)
{
    int Row = 0;
    int Seat = 0;





    cout << "What Row are you interested in?";
    cin >> Row;
    cout << "What seat are you interested in?";
    cin >> Seat;
    Row--;
    Seat--;
    Purchase = Purchase + 1;
    cout << Purchase;
   
    ROWandColumn[Row][Seat]= 'x';
    
    display(ROWandColumn, ROW);


return Purchase;
}
int seatpurchases(char firstset[][COL], int ROW, int purchase)
{
    int Row = 0;
    int Seat = 0;
    int answer = 0;




    {

        while (answer == 0)
        {
            cout << "How many seats are you buying?" << endl;
            cin >> answer;
        }
        for( int row = 0; row < answer; row++)
        {
            purchase++;

            cout << "What Row are you interested in for purchase " << purchase << "?"  << endl;
            cin >> Row;
            cout << "From what seat are you interested in purchase " << purchase << "?" << endl;
            cin >> Seat;

            Row--;
            Seat--;

            firstset[Row][Seat]= 'x';
        }

        display(firstset, ROW);
    }
    return purchase;
}

void availableseats(int soldseat, int soldseats, double profit, int totalseats)
{
    int totalseatssold = 0;
    int totalseatsleft = 0;

    //math
    totalseatssold = soldseat + soldseats;
    totalseatsleft = totalseats - totalseatssold;


    cout << "Total Seats Sold: " << totalseatssold << endl;

    cout << "Total Seats Open: " << totalseatsleft << endl;

    cout << "Total Profit: " << profit << endl;
}

//make equations in each function and return them to add here

[JockX]

The function is returning purchase, you are just not capturing the return by value.
Try defining function like this to return by reference:
int seatpurchases(char firstset[][COL], int ROW, int & purchase)

or use seatpurchases like this to return by value:
purchaseforone = seatpurchase(grid, ROW, purchaseforone );

[snowright]

I believe you are talking about the line
cout << purchaseforone << endl;

It returns 0 since variable purchaseforone is initialized as 0 and never changed. The return value of the function seatpurchase somehow is never printed in your code.

EDIT: I am slowing down.

[Mebant]

I'm sorry I am still a beginner can you give me a more detailed answer please. I'm dyslexic.

[Chervil]

At line 76

    seatpurchase(grid, ROW, purchaseforone);

the function is called, it returns a value, but the returned value is not stored or used anywhere.

You need to do something like this:

    int result = seatpurchase(grid, ROW, purchaseforone);
    cout << result;

or perhaps

    cout << seatpurchase(grid, ROW, purchaseforone);