```cpp
#include <iostream>

int main() {
    double num1, num2;

    std::cout << "Enter first number: ";
    std::cin >> num1;
    std::cout << "Enter second number: ";
    std::cin >> num2;

    double sum = num1 + num2;
    double difference = num1 - num2;
    double product = num1 * num2;
    double quotient = num1 / num2;

    std::cout << "Sum: " << sum << std::endl;
    std::cout << "Difference: " << difference << std::endl;
    std::cout << "Product: " << product << std::endl;
    std::cout << "Quotient: " << quotient << std::endl;

    return 0;
}
```

To compile and run the program:

1. Save the code in a file named `main.cpp`.
2. Open a terminal/command prompt and navigate to the directory where the file is saved.
3. Run the following command to compile the program: `g++ main.cpp -o main`
4. Run the compiled program by entering `./main` on Unix-based systems or `main.exe` on Windows.
Implement a C++ program that accepts user input for two numbers and prints their sum, difference, product, and quotient.
