我的程序中的这行代码是否被视为函数？

Question

output_air_speed = (bird_freq) * (bird_amp * 0.01) / (STROUHAL);

//我认为这是一个函数，但我不确定？代码有效，我只是想知道这一行是否会被视为一个函数。以下是完整的程序。

void calculate_air_speed()
{
    std::string bird_name;
    double bird_freq;
    double bird_amp;
    double output_air_speed;

    std::cout << "Enter bird name: ";
    std::getline(std::cin >> std::ws, bird_name);

    std::cout << "Enter bird frequency: ";
    std::cin >> bird_freq;

    std::cout << "Enter bird amplitude: ";
    std::cin >> bird_amp;

    output_air_speed = (bird_freq) * (bird_amp * 0.01) / (STROUHAL);

    std::cout << "The air speed of the " << bird_name << " is " << output_air_speed << " meters per second " << std::endl;
}

我想知道函数和过程之间的区别