Problems with Code, Cash Register problem

[cwilber3249]

I am tryign to make this code for a class i have and i can get it to compile and what not but it doesnt post the right change. Heres is my code, Please help. Its very basic and i think i am just confusing myself.

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
 
//Prices for items
void priceAmount(float info[])
{
    float price, subtotal, tax, total;
    char select = '0';
 
    cout <<"Please enter the price of your first item: ";
    cin >> subtotal;
 
    do{
        cout << "would you like to purchase another item? (Y or N): ";
        cin >> select;
 
        while (select != 'Y' && select != 'y' && select != 'N' && select !='n')
        {
            cout << "Please enter Y or N:";
            cin >> select; 
        }
 
        if (select == 'Y' || select == 'y')
        {
            cout << "Enter the price of the nest item: ";
            cin >> price;
 
            subtotal = subtotal + price;
        }
    }while(select == 'Y' || select == 'y');
 
    tax = 0.05 * subtotal;
    total = tax + subtotal;
 
    info[1] = subtotal;
    info[2] = tax;
    info[3] = total;
    cout << "Total = " << setprecision(2) << fixed << showpoint << total <<endl;
 
    return;
}
 
//Payment
void paymentAmount(float info[])
{
    float payment = 0.0;
 
    cout << "Enter payment amount: ";
    cin >> payment;
 
    while(payment < info[3])
    {
        cout << "Not enough money, Do dishs, or enter new payment: ";
        cin >> payment;
    }
 
    info[4] = payment;
 
    return;
}
 
//whats the change
 
void changeAmount(float info[])
{
    float change;
    change = info[4] - info[3];
    change = change * 100;
    change = floor(change);
    change = change / 100.0;
    info[5] = change;
 
    return;
}
 
//Change
 
void changeCalc(float info[])
{
    float change = 0.0;
    int amount, dollars, quart, dime, nick, penn;
    amount = dollars = quart = dime = nick = penn = 0;
    change = info[5];
 
    amount = change * 100;
 
    dollars = amount / 100;
    amount = amount % 100;
 
    quart = amount / 25;
    amount = amount % 25;
 
    dime = amount / 10;
    amount = amount % 10;
 
    nick = amount / 5;
    penn = amount % 5;
 
 
 
    info[1] = dollars;
    info[2] = quart;
    info[3] = dime;
    info[4] = nick;
    info[5] = penn;
 
    return;
 
}
 
//display
 
void display(float change[], float purchase[])
{
    cout << left << setw(25) << "Subtotal: " << setw(30) << right << setprecision(2) << fixed << showpoint << purchase[1] <<endl;
    cout << left << setw(25) << "Tax: " << setw(30) << right << setprecision(2) << fixed << showpoint << purchase[2] <<endl;
    cout << left << setw(25) << "Total: " << setw(30) << right << setprecision(2) << fixed << showpoint << purchase[3] <<endl;
    cout << left << setw(25) << "Payment: " << setw(30) << right << setprecision(2) << fixed << showpoint << purchase[4] <<endl << endl;
 
    cout << "Change: " << (int)change[1] << "dollars, " << (int)change[2] << "quarters, " << (int)change[3] <<  "dimes, " << (int)change[4] <<"nickels, " << (int)change[5] << "pennies." << endl << endl;
 
    return;
}
 
int main()
{
    float purchase[6] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0};
    //                subtotal,tax,total,payment,change
 
    priceAmount(purchase);
 
    paymentAmount(purchase);
 
    changeAmount(purchase);
 
    float change[7] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0};
    //                dollars,quarters,dimes,nickles,pennies,change
    change[6] = purchase[5];
 
    changeCalc(change);
 
    display(change, purchase);
 
    return 0;
 
 
 
 
}
 

When i go through the program it always ends up just displaying 0dollars, 0 quarters, 0dimes, 0nickles, 0pennies. I dont know where i messed up my code

[weaknessforcats]

The fundamental error is in using floating point for finance. Floating point is meant for scientific research and not for money. That decimal has trapped more than one beginner.

Use an int and keep your money in pennies.

[samadamsheadly]

(1) Lines 85 and 140 are not consistent.
(2) As noted previously, floating point introduces rounding issues, that may or may not be to your advantage.

C++ supports classes and one can identify the data member(s) of an object in a way that does not employ a (confusing/meaningless) array index.

Alternatively one can pass the "purchase" value as a separate argument. From a programming stand point it is always wise to have an array only represent closely related data; arrays are relatively primitive data structures.