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#include "stdafx.h"
#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <cmath>
using namespace std;
struct Tools {
string name;
int amount;
double price;
};
int search(Tools inventory[], string name, int length);
void remove(Tools inventory[], string name, int &length);
int main()
{
char userChoice;
int count = 0;
ifstream fin;
Tools inventory[100];
fin.open("inventory.txt");
while (!fin.eof()) { //while not end of report, do the following:
fin >> inventory[count].name >> inventory[count].amount >> inventory[count].price; //Reads in each set of text on the line and stores into appropriate variable
count++;
}
fin.close();
cout << "Select from menu:" << endl << "E - Edit" << endl << "I - Insert" << endl << "R - Remove" << endl << "D - Display Table" << endl << "Q - Quit";
cout << endl << endl << "Enter letter of choice: ";
cin >> userChoice;
while (userChoice != 'Q') {
if (userChoice == 'E') {
string userProduct, posOrNeg, editValue;
int spotInArray, currentInv, amountToChange;
cout << "Enter product:";
cin >> userProduct;
spotInArray = search(inventory, userProduct, 100);
if (spotInArray != -1) {
cout << "Enter amount to add (+) or subtract (-):";
cin >> editValue;
currentInv = inventory[spotInArray].amount;
posOrNeg = editValue.substr(0, 1);
amountToChange = std::stoi(editValue.substr(1, 3));
if (posOrNeg == "+") {
inventory[spotInArray].amount = currentInv + amountToChange;
cout << "Item " << userProduct << " has new amount in stock " << inventory[spotInArray].amount << endl << endl;
}
if (posOrNeg == "-") {
inventory[spotInArray].amount = currentInv - amountToChange;
cout << "Item " << userProduct << " has new amount in stock " << inventory[spotInArray].amount << endl << endl;
}
}
if (spotInArray == -1) {
cout << "Item " << userProduct << " is not found." << endl << endl;
}
cout << "Enter letter of choice: ";
cin >> userChoice;
}
if (userChoice == 'I') {
string prodName;
int prodAmount, subArrayLength = 0, spotInArray;
double prodPrice;
subArrayLength = (4 * count) / 4;
cout << "Enter new product ID, stock, and unit price: ";
cin >> prodName >> prodAmount >> prodPrice;
subArrayLength = subArrayLength + 4;
spotInArray = search(inventory, prodName, 100);
if (spotInArray == -1) {
inventory[subArrayLength].name = prodName;
inventory[subArrayLength].amount = prodAmount;
inventory[subArrayLength].price = prodPrice;
count++;
cout << "Item " << prodName << " is inserted." << endl << endl;
}
if (spotInArray != -1) {
cout << "Item " << prodName << " already exists." << endl << endl;
}
cout << "Enter letter of choice: ";
cin >> userChoice;
}
if (userChoice == 'R') {
string toRemove;
int spotInArray;
int subArrayLength = (4 * count) / 4;
cout << "Enter ID of product to remove: ";
cin >> toRemove;
spotInArray = search(inventory, toRemove, subArrayLength);
if (spotInArray != -1) {
remove(inventory, toRemove, subArrayLength);//needs to be subarray length
cout << "Item " << toRemove << " is removed." << endl << endl;
}
if (spotInArray == -1) {
cout << "Item " << toRemove << " does not exist." << endl << endl;
}
cout << "Enter letter of choice: ";
cin >> userChoice;
}
if (userChoice == 'D') {
int counter = 0;
double totalInventoryPrice = 0;
while (inventory[counter].amount >= 0) {
cout << left;
cout << setw(15) << inventory[counter].name << setw(15) << inventory[counter].amount << setw(15) << inventory[counter].price << endl;
totalInventoryPrice = totalInventoryPrice + (inventory[counter].price * inventory[counter].amount);
counter++;
}
cout << endl << "Total inventory: " << totalInventoryPrice << endl << endl;
cout << "Enter letter of choice: ";
cin >> userChoice;
}
if (userChoice == 'Q') {
cout << endl;
}
}
return 0;
}
int search(Tools inventory[], string name, int length) {
int loc = -1;
for (int i = 0; i < length; i++)
if (inventory[i].name == name)
loc = i;
return loc;
}
void remove(Tools inventory[], string name, int &length)
// PRE: 0 <= len <= array size
// POST: The first occurrence of the target is removed from the array
{
int res = search(inventory, name, 100);; // call search function on target
if (res != -1) // if target is found ...
{
length--; // decrement subarray length
inventory[res] = inventory[length]; // overwrite item with last value of subarray
}
}
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