Solution: The Safe Inventory System

#include <iostream>
#include <thread>
#include <vector>
#include <mutex>
int totalItems = 0;
std::mutex inventoryMutex; // Global mutex for synchronization
void processShipment() {
    for (int i = 0; i < 10000; ++i) {
        // Critical section start
        std::lock_guard<std::mutex> guard(inventoryMutex); 
        totalItems++;
        // Critical section end (guard is destroyed, mutex unlocked)
    }
}
int main() {
    {
        // Launch two threads attempting to modify the same variable
        std::jthread robot1(processShipment);
        std::jthread robot2(processShipment);
    } // Both threads automatically join here
    std::cout << "Final Inventory Count: " << totalItems << "\n";
    
    if (totalItems == 20000) {
        std::cout << "Success! Count is correct.\n";
    } else {
        std::cout << "Error! Race condition detected.\n";
    }
    return 0;
}