c++ programming :

everything is done, except when you enter ("a" ) in "F" option , it does not work. here is the program.

#include

#include

#include

#include

#include

using namespace std;

#define MAX 1000

class Inventory {

private:

long itemId;

string itemName;

int numberOfItems;

double buyingPrice;

double sellingPrice;

double storageFees;

public:

void setItemId(long id) {

itemId = id;

}

long getItemId() {

return itemId;

}

void setItemName(string name) {

itemName = name;

}

string getItemName() {

return itemName;

}

void setNumberOfItems(int nOT) {

numberOfItems = nOT;

}

int getNumberOfItems() {

return numberOfItems;

}

void setBuyingPrice(double bPrice) {

buyingPrice = bPrice;

}

double getBuyingPrice() {

return buyingPrice;

}

void setSellingPrice(double sp) {

sellingPrice = sp;

}

double getSelligPrice() {

return sellingPrice;

}

void setStorageFees(double sf) {

storageFees = sf;

}

double getStorageFees() {

return storageFees;

}

};

void menu(Inventory in[], int n) {

while (true) {

char ch;

cout << "----Menu----" << endl;

cout << "a. Print Items Information" << endl;

cout << "b. Print General Information" << endl;

cout << "c. PrintItems Table" << endl;

cout << "d. Edit an Item Informaton" << endl;

cout << "e. Save information in file" << endl;

cout << "f. exit" << endl;

cout << "Enter your choice: ";

cin >> ch;

switch (ch) {

case 'a':

for (int i = 0; i < n; i++) {

cout << "----Item" << i + 1 << "----" << endl;

cout << std::fixed << std::setprecision(2);

cout << "Item id:" << in[i].getItemId() << endl;

cout << "Item Name:" << in[i].getItemName() << endl;

cout << "Number of Items: " << in[i].getNumberOfItems() << endl;

cout << "Selling Price:" << in[i].getSelligPrice() << endl;

cout << "Buying Price:" << in[i].getBuyingPrice() << endl;

cout << "Storage Fee: " << in[i].getStorageFees() << endl;

}

break;

case 'b': {

int total = 0;

double totalP = 0;

double Sp = 0, Bp = 0;

for (int i = 0; i < n; i++) {

total += in[i].getNumberOfItems();

Sp += in[i].getSelligPrice();

Bp += in[i].getBuyingPrice();

totalP += (in[i].getNumberOfItems()

* (in[i].getSelligPrice()

- (in[i].getBuyingPrice()

+ in[i].getStorageFees())));

}

cout << std::fixed << std::setprecision(2);

cout << "Total Number of Items: " << total << endl;

cout << "Total Profit: " << totalP << endl;

cout << "Average Profit: " << totalP / n << endl;

cout << "Average Buying Price: " << Bp / n << endl;

cout << "Average Selling Price: " << Sp / n << endl;

}

break;

case 'c':

//for(int i=0;)

cout

<< "Item Id\tItem Name\tProfit\tSelling Price\tBuying Price\tStorage Fee"

<< endl;

cout << std::fixed << std::setprecision(2);

for (int i = 0; i < n; i++) {

double p = (in[i].getNumberOfItems()

* (in[i].getSelligPrice()

- (in[i].getBuyingPrice()

+ in[i].getStorageFees())));

cout << in[i].getItemId() << "\t" << in[i].getItemName()

<< "\t\t" << p << "\t\t" << in[i].getSelligPrice()

<< "\t\t" << in[i].getBuyingPrice() << "\t\t"

<< in[i].getStorageFees() << endl;

}

break;

case 'd': {

long id;

cout << "enter item id: ";

cin >> id;

int noi;

string name;

double sp, sf, bp;

for (int i = 0; i < n; i++) {

if (id == in[i].getItemId()) {

cout << "Enter new item details" << endl;

cout << "Item Name: ";

cin.ignore(numeric_limits < streamsize > ::max(), ' ');

getline(cin, name);

cout << "Selling Price: ";

cin >> sp;

cout << "Buying Price: ";

cin >> bp;

cout << "Storage Fees: ";

cin >> sf;

cout << "Number of Items: ";

cin >> noi;

in[i].setItemName(name);

in[i].setSellingPrice(sp);

in[i].setBuyingPrice(bp);

in[i].setStorageFees(sf);

in[i].setNumberOfItems(noi);

cout << "Data for item " << id << " Updated sucessfully"

<< endl;

break;

}

}

}

break;

case 'e': {

ofstream out;

out.open("output.txt");

out

<< "Item Id\tItem Name\tSelling Price\tBuying Price\tStorage Fee"

<< endl;

for (int i = 0; i < n; i++) {

out << std::fixed << std::setprecision(2) << in[i].getItemId()

<< "\t" << in[i].getItemName() << "\t\t"

<< in[i].getSelligPrice() << "\t\t"

<< in[i].getBuyingPrice() << "\t\t"

<< in[i].getStorageFees() << endl;

}

out.close();

}

break;

case 'f':

//return 0;

exit(0);

break;

default:

cout << "Invalid choice!!" << endl;

}

}

}

int main() {

char ch;

int n, noi;

long id;

double sp, bp, sf;

string iname;

cout << "How would you like to populate the data (M) Manual, (F) File: ";

cin >> ch;

if (ch == 'M') {

cout << "How many items would you ike to add: ";

cin >> n;

Inventory in[n];

for (int i = 0; i < n; i++) {

cout << "----Item" << i + 1 << "----" << endl;

cout << "Item id:";

cin >> id;

cin.ignore(numeric_limits < streamsize > ::max(), ' ');

cout << "Item Name:";

getline(cin, iname);

cout << "Number of Items: ";

cin >> noi;

cout << "Selling Price:";

cin >> sp;

cout << "Buying Price:";

cin >> bp;

cout << "Storage Fee: ";

cin >> sf;

in[i].setItemId(id);

in[i].setItemName(iname);

in[i].setNumberOfItems(noi);

in[i].setSellingPrice(sp);

in[i].setBuyingPrice(bp);

in[i].setStorageFees(sf);

}

menu(in, n);

} else if (ch == 'F') {

ifstream fin;

fin.open("input.txt");

Inventory in[MAX];

int i = 0;

while (fin >> id >> iname >> noi >> sp >> bp >> sf) {

in[i].setItemId(id);

in[i].setItemName(iname);

in[i].setNumberOfItems(noi);

in[i].setSellingPrice(sp);

in[i].setBuyingPrice(bp);

in[i].setStorageFees(sf);

i++;

}

n = i;

menu(in, n);

} else {

cout << "Please enter a valid option(M/F)" << endl;

}

}