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#include <cstdlib>
#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <sstream>
using namespace std;
struct InventoryRecord
{
string name; // inventory item name
int qty; // how many are in stock
int number; // the item number
};
// const for the max size of the record array
const int MAX_SIZE = 9;
// function prototypes
void addData(InventoryRecord list[], int& size);
void dispData(const InventoryRecord list[], int size);
void saveFile(const InventoryRecord list[], int size);
void openFile(InventoryRecord list[], int& size);
void buyItem(InventoryRecord list[], int& size);
char getMenuResponse();
int main(int argc, char *argv[])
{
InventoryRecord recList[MAX_SIZE];
int numOfRecs = 0;
bool run = true;
do
{
cout << "Mike's Fish Market - " << numOfRecs << " items in stock" << endl;
switch (getMenuResponse())
{
//case 'A': addData(recList, numOfRecs); break;
case 'D': dispData(recList, numOfRecs); break;
case 'O': openFile(recList, numOfRecs); break;
case 'B': buyItem(recList, numOfRecs); break;
case 'F': saveFile(recList, numOfRecs); break;
case 'S': run = false; break;
default: cout << "That is NOT a valid choice" << endl;
}
} while (run);
cout << endl << "Program Terminated" << endl;
// system("PAUSE"); // Program exits immediatly upon "Quit" if commented out
return EXIT_SUCCESS;
}
// Task: Allow data entry of one inventory item
// Accepts: References to the inventory array and its size
// Returns: Nothing
// Modifies: The array and size 'actual parameter'
// NOTE: Could be modified to allow entry of more than one item
void addData(InventoryRecord list[], int& size)
{
InventoryRecord tmp; // declare a temp item that we will load before putting in the array
char response;
char str[256]; // needed for cin.getline; we are going to use a char array
if (size < MAX_SIZE) {
system("cls");
cout << "Enter Inventory Records" << endl << endl;
cout << "Name: ";
// Get up to 256 characters from the keyboard including white space.
// Stop reading if encounter the \n first. If there's any chance of
// more than 256 characters you will have to clean up cin with
// cin.ignore before the next input.
cin.getline(str, 256, '\n'); // for char arrays; different from the other getline
tmp.name = str;
cout << "Quantity: ";
cin >> tmp.qty;
cout << "Item Number: ";
cin >> tmp.number;
cout << endl;
// see if this record should be added to the array
cout << "Add the record to inventory? (y/n) ";
cin >> response;
if (toupper(response) == 'Y')
list[size++] = tmp;
}
else {
cout << "Inventory at full; cannot enter more unit." << endl;
system("pause");
}
system("cls");
}
void dispData(const InventoryRecord list[], int size)
{
system("cls");
int number = 0;
if (size < 1) {
cout << "Nothing to display" << endl;
}
else {
cout << "Mike's Fish Market" << endl << endl;
cout << "All Inventory item has been shown" << endl << endl;
cout << fixed << setprecision(2);
cout << "Item Name Quanitity Item Number" << endl;
cout << "~~~~~~~~~~~~~~~~~~" << endl;
cout << left;
for (int i = 0; i < size; i++) {
cout << setw(21) << list[i].name << right
<< setw(4) << list[i].qty
<< setw(10) << list[i].number << left << endl;
//number = number + list[i].number * list[i].qty;
}
cout << "~~~~~~~~~~~~~~~~~~~" << endl;
cout << right << setw(3) << size;
cout << " items listed" <<endl;
//cout << right << setw(19) << number << endl << endl;
}
system("PAUSE");
system("cls");
}
// Buy item
void buyItem(const InventoryRecord list[], int size) {
system("cls");
int number = 0;
if (size < 1) {
cout << "Nothing to display" << endl;
}
else {
cout << "Mike's Fish Market" << endl << endl;
cout << "Enter the Item number and quanitity of the item you want to buy" << endl << endl;
InventoryRecord buy; // declare a temp item that we will load before putting in the array
InventoryRecord tmp;
char response;
char str[256];
if (size < MAX_SIZE) {
system("cls");
cout << "Item Number: ";
cin >> tmp.number;
cout << "Quantity: ";
cin >> (tmp.qty = (buy.qty - tmp.qty));
saveFile;
cout << endl;
}
}
}
// Save records to disc
void saveFile(const InventoryRecord list[], int size) {
ofstream outfi("store.txt");
// make sure the file stream is open before doing IO
if (!outfi.fail()) {
system("cls");
cout << "Saving inventory to the disc ";
for (int i = 0; i < size; i++) {
outfi << list[i].name << ';'
<< list[i].qty << ';'
<< list[i].number;
// Start a new line after all but the last record
// Simplifies reading the file as EOF is at end of last line
if (i < size - 1) outfi << endl;
}
cout << endl << size << " records writen to the disc." << endl;
outfi.close();
system("PAUSE");
system("cls");
}
else {
cout << "ERROR: problem with file" << endl;
system("PAUSE");
system("cls");
}
}
// Open file and load array
void openFile(InventoryRecord list[], int& size)
{
ifstream infi("store.txt");
string str;
stringstream strstrm;
// make sure the file stream is open before doing IO
if (!infi.fail()) {
system("cls");
cout << "Reading inventory from the disc ";
size = 0; // overwrite any existing records
while (!infi.eof() && size < MAX_SIZE) {
// get and store the name
getline(infi, str, ';');
list[size].name = str;
// get, convert and store the quantity
getline(infi, str, ';');
strstrm.str(""); strstrm.clear(); // empty and clear the stringstream
strstrm << str;
strstrm >> list[size].qty;
// get, convert and store the cost
getline(infi, str);
strstrm.str(""); strstrm.clear(); // empty and clear the stringstream
strstrm << str;
strstrm >> list[size++].number;
}
cout << endl << size << " records read from the disc." << endl;
system("PAUSE");
system("cls");
}
else { // something went wrong with opening the file
cout << "ERROR: problem with file" << endl;
system("PAUSE");
system("cls");
}
}
char getMenuResponse()
{
char response;
cout << endl << "Make your selection" << endl
<< "(O)pen Store, (D)isplay Items, (B)uy Item, (F)ile Save, (S)top" << endl
<< "> ";
cin >> response;
cin.ignore(256, '\n');
// clean-up up to 256 chars including the delimiter specified (\n, the endl)
// OR stop when the \n is encountered after removing it.
return toupper(response);
// note the use of toupper, why?
}
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