Regarding Structs and Using Them With Array's - c++

Question

I'm trying to write a program that will take every line from a text file and load the value into an array. For some reason however, when I try create a dynamic array and try to put information in any position beyond 0, the information from from position zero gets copied over and I can't seem to understand why. Specifically in this program its in the readInventory function I have written. Basically, why can't I copy one struct to the other?
Sample from file
A009 Strawberries_Case 0 12.50 8
4028 STRAWBERRIES_PINT 0 0.99 104
4383 MINNEOLAS 1 0.79 187.3
4261 Rice_1_LB_Bag 0 0.49 107
Code from program
#include <iostream>
#include <string>
#include <cstring>
#include <iomanip>
#include <fstream>
using namespace std;
struct Product
{
string PLU;
string name;
int salesType;
double unitPrice/*rice per pound*/;
double inventory;
};
struct ItemSold
{
string PLU;
string name;
double cost;
};
Product *inventoryLevels = new Product[100];
ItemSold *itemsSold = new ItemSold[100];
bool readInventory(string filename, int &numberOfItems);
double checkout(int inventoryLength);
double price(string PLU, double units);
int typeCheck(string PLU, int inventoryLength);
string nameCheck(string PLU, int inventoryLength);
int main()
{
int numberOfItems = 0;
string filename = "products.txt";
int total;
if (readInventory(filename, numberOfItems))
{
cout << "Inventory file has errors, please make changes before continuing" << endl << endl;
}
total = checkout(numberOfItems);
cout << total;
system("pause");
}
double checkout(int inventoryLength)
{ // Function that will be used to perform the checkout by the user
string PLU = "1";
double units/*pounds*/;
int salesType;
int counter = 0;
int temp;
double total = 0;
while (PLU != "0")
{
cout << "Enter a PLU: ";
cin >> PLU;
itemsSold[counter].PLU = PLU;
if (PLU == "0")
{
// do nothing
}
else
{
itemsSold[counter].name = nameCheck(PLU, inventoryLength);
if (typeCheck(PLU, inventoryLength) == 0)
{
cout << " Enter the number of units being bought: ";
cin >> units;
while (units > inventoryLevels[counter].inventory)
{
cout << "You have entered in more units than we have on hand \n Please reduce the number of units being bought\n";
cout << " Enter the number of units being bought: ";
cin >> units;
}
itemsSold[counter].cost = price(PLU, units);
inventoryLevels[counter].inventory -= units;
}
else
{
cout << "Enter the number of pounds of the item being bought: ";
cin >> units;
itemsSold[counter].cost = price(PLU, units);
while (units > inventoryLevels[counter].inventory)
{
cout << "You have entered in more pounds than we have on hand \n Please reduce the number of pounds being bought\n";
cout << "Enter the number of pounds of the item being bought: ";
cin >> units;
}
inventoryLevels[counter].inventory -= units;
}
counter++;
}
}
temp = counter;
while (temp >= 0)
{
total += itemsSold[temp].cost;
temp--;
}
return total;
}
string nameCheck(string PLU, int inventoryLength)
{
for (int k = 0; k < inventoryLength; k++)
{
if (inventoryLevels[k].PLU == PLU)
{
return inventoryLevels[k].name;
}
}
return "We are currently out of stock of this item.";
}
int typeCheck(string PLU, int inventoryLength)
{
for (int k = 0; k < inventoryLength ; k++)
{
if (inventoryLevels[k].PLU == PLU)
{
return inventoryLevels[k].salesType;
}
}
}
double price(string PLU, double units)
{ //
double price;
for (int k = 0; k < 100; k++)
{
if (inventoryLevels[k].PLU == PLU)
{
price = units * (inventoryLevels[k].unitPrice);
return price;
}
}
}
bool readInventory(string filename, int &numberOfItems)
{
// File object
fstream inventory;
// Some temp variable used to validate information is still in file while it is being transfered to array
//string temp;
// Open the inventory file
inventory.open(filename);
// Will temporarily hold the properties of an item until loaded onto the array
Product temp;
// Counter will allow for a new item to be stored onto the next available location in the array
int counter = 0;
// Will demonstrate whether or not there is an error
int error = 0;
// Store items and their properties in the global array
while (inventory >> temp.PLU >> temp.name >> temp.salesType >> temp.unitPrice >> temp.inventory)
{
// Checks to see if they
if ((temp.PLU.at(0) > 57) || (temp.PLU.at(1) > 57) || (temp.PLU.at(2) > 57) || (temp.PLU.at(3) > 57))
{
error++;
}
else
{
inventoryLevels[numberOfItems].PLU = temp.PLU;
inventoryLevels[numberOfItems].name = temp.name;
inventoryLevels[numberOfItems].salesType = temp.salesType;
inventoryLevels[numberOfItems].unitPrice = temp.unitPrice;
inventoryLevels[numberOfItems].inventory = temp.inventory;
numberOfItems++;
counter++;
}
}
// If there is no error return true
if (error == 0)
{
return false;
}
// If there is an error return false
else if (error > 0)
{
return true;
}
}

Answer 1

When you assign values here,
while (inventory >> temp.PLU >> temp.name >> temp.salesType >> temp.unitPrice >> temp.inventory)
Am I right to assume that the input file is in the format (since you're assigning each line to the variables?
line 1: Some string you want assigned to PLU
line 2: Some string you want assigned to name
line 3: Some Int you want assigned to salestype
..........
..........
line n:string PLU