#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <algorithm>
using namespace std;
// Define the structure for a T-shirt
struct TShirt {
int id;
string name;
string size;
double price;
};
class TShirtStore {
private:
vector<TShirt> tshirts;
int nextId = 1; // Counter for generating unique IDs
public:
// Display the main menu
void displayMenu() {
cout << "\n===== T-Shirt Store Management System =====\n";
cout << "1. Add T-Shirt\n";
cout << "2. Update T-Shirt Details\n";
cout << "3. Delete T-Shirt\n";
cout << "4. View All T-Shirts\n";
cout << "5. Save Data to File\n";
cout << "6. Load Data from File\n";
cout << "7. Exit\n";
}
// Add a new T-shirt to the system
void addTShirt() {
TShirt tshirt;
tshirt.id = nextId++;
cout << "Enter T-shirt name: ";
getline(cin, tshirt.name);
// Input validation: Ensure the name is not an empty string
while (tshirt.name.empty()) {
cout << "Name cannot be empty. Enter T-shirt name: ";
getline(cin, tshirt.name);
}
cout << "Enter T-shirt size: ";
getline(cin, tshirt.size);
// Input validation: Ensure the size is not an empty string
while (tshirt.size.empty()) {
cout << "Size cannot be empty. Enter T-shirt size: ";
getline(cin, tshirt.size);
}
// Input validation for price
string priceInput;
while (true) {
cout << "Enter T-shirt price: ";
getline(cin, priceInput);
try {
tshirt.price = stod(priceInput); // Convert string to double
if (tshirt.price < 0) {
cout << "Price cannot be negative. Please enter a non-negative price.\n";
} else {
break; // Exit the loop if the input is a valid double
}
} catch (const invalid_argument& e) {
cout << "Invalid input. Please enter a valid numeric price.\n";
} catch (const out_of_range& e) {
cout << "Input out of range. Please enter a valid numeric price.\n";
}
}
cin.ignore(); // Clear the input buffer
tshirts.push_back(tshirt);
cout << "T-shirt added successfully! ID: " << tshirt.id << '\n';
}
// Update the details of an existing T-shirt by ID
void updateTShirtDetails() {
int id;
cout << "Enter T-shirt ID: ";
cin >> id;
auto it = find_if(tshirts.begin(), tshirts.end(), [id](const TShirt& t) {
return t.id == id;
});
if (it != tshirts.end()) {
cout << "Enter new name for T-shirt (ID: " << id << "): ";
getline(cin, it->name);
// Input validation: Ensure the name is not an empty string
while (it->name.empty()) {
cout << "Name cannot be empty. Enter new name for T-shirt (ID: " << id << "): ";
getline(cin, it->name);
}
cout << "Enter new size for T-shirt (ID: " << id << "): ";
getline(cin, it->size);
// Input validation: Ensure the size is not an empty string
while (it->size.empty()) {
cout << "Size cannot be empty. Enter new size for T-shirt (ID: " << id << "): ";
getline(cin, it->size);
}
// Input validation for price
string priceInput;
while (true) {
cout << "Enter new price for T-shirt (ID: " << id << "): ";
getline(cin, priceInput);
try {
it->price = stod(priceInput); // Convert string to double
if (it->price < 0) {
cout << "Price cannot be negative. Please enter a non-negative price.\n";
} else {
break; // Exit the loop if the input is a valid double
}
} catch (const invalid_argument& e) {
cout << "Invalid input. Please enter a valid numeric price.\n";
} catch (const out_of_range& e) {
cout << "Input out of range. Please enter a valid numeric price.\n";
}
}
cin.ignore(); // Clear the input buffer
cout << "T-shirt details updated successfully!\n";
} else {
cout << "T-shirt not found!\n";
}
}
// Delete an existing T-shirt from the system by ID
void deleteTShirt() {
int id;
cout << "Enter T-shirt ID: ";
cin >> id;
auto it = find_if(tshirts.begin(), tshirts.end(), [id](const TShirt& t) {
return t.id == id;
});
if (it != tshirts.end()) {
tshirts.erase(it);
cout << "T-shirt deleted successfully!\n";
} else {
cout << "T-shirt not found!\n";
}
}
// View all T-shirts in the system
void viewAllTShirts() {
cout << "\n===== All T-Shirts =====\n";
for (const auto& tshirt : tshirts) {
cout << "ID: " << tshirt.id << ", Name: " << tshirt.name << ", Size: " << tshirt.size << ", Price: " << tshirt.price << '\n';
}
}
// Save the current state of the data set to a file
void saveToFile() {
ofstream outFile("tshirt_data.txt");
if (outFile.is_open()) {
for (const auto& tshirt : tshirts) {
outFile << tshirt.id << ' ' << tshirt.name << ' ' << tshirt.size << ' ' << tshirt.price << '\n';
}
outFile.close();
cout << "Data saved to file successfully!\n";
} else {
cout << "Error: Unable to open file for writing.\n";
}
}
// Load data from a file
void loadFromFile() {
tshirts.clear(); // Clear existing data
ifstream inFile("tshirt_data.txt");
if (inFile.is_open()) {
TShirt tshirt;
while (inFile >> tshirt.id >> tshirt.name >> tshirt.size >> tshirt.price) {
tshirts.push_back(tshirt);
}
inFile.close();
cout << "Data loaded from file successfully!\n";
} else {
cout << "No previous data found.\n";
}
}
// Run the T-shirt store management system
void run() {
string choice;
while (true) {
displayMenu();
cout << "Enter your choice (1-7): ";
getline(cin, choice);
if (choice == "1") {
addTShirt();
} else if (choice == "2") {
updateTShirtDetails();
} else if (choice == "3") {
deleteTShirt();
} else if (choice == "4") {
viewAllTShirts();
} else if (choice == "5") {
saveToFile();
} else if (choice == "6") {
loadFromFile();
} else if (choice == "7") {
cout << "Exiting T-Shirt Store Management System. Goodbye!\n";
break;
} else {
cout << "Invalid choice. Please enter a number between 1 and 7.\n";
}
}
}
};
int main() {
TShirtStore tshirtStore;
tshirtStore.run();
return 0;
}
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