reaction time tester
**Reaction Time Tester in C++** ===================================== This program will measure the reaction time of a user by displaying a random number and asking them to press a key as soon as they see it. The time it takes for the user to press the key is then calculated and displayed. **Code** -------- ```cpp #include <iostream> #include <cstdlib> #include <ctime> #include <chrono> // Function to get the current time in milliseconds long long get_time() { return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count(); } int main() { // Seed the random number generator std::srand(std::time(0)); // Display a random number int number = std::rand() % 100 + 1; std::cout << "Press a key when you see the number: " << number << std::endl; // Get the current time before the user presses a key long long start_time = get_time(); // Wait for the user to press a key std::cin.get(); // Get the current time after the user presses a key long long end_time = get_time(); // Calculate the reaction time long long reaction_time = end_time - start_time; // Display the reaction time std::cout << "Your reaction time was: " << reaction_time << " milliseconds" << std::endl; return 0; } ``` **How to Use** -------------- 1. Compile the program using `g++`: `g++ reaction_time_tester.cpp -o reaction_time_tester` 2. Run the program: `./reaction_time_tester` 3. Press a key when you see the displayed number. 4. The program will display your reaction time in milliseconds. **Note** ------ This program uses the `std::chrono` library to get the current time in milliseconds. The `get_time()` function returns the current time in milliseconds since the epoch (January 1, 1970, 00:00:00 UTC). The reaction time is calculated by subtracting the start time from the end time.