principles_and_practice_using_cpp

Key points

1. chapter 5 generate_rand_nums() function, use C++11 random library. to find more detail, the following links can be helpful:
   1. Actually, this is the example that using in my code. Generate random numbers using C++11 random library
   2. Cpp reference -- Pseudo-random number generation
   3. Cpp reference -- srand
2. chapter 9 mentioned that you can also use struct for a data structure
   1. here's a link to discuss the diff between class and struct: Function for C++ struct
3. you'd better use scoped enumeration instead of using plain enumeration, which means:
   1. enum class is better than enum declaration
4. code like below, static will let dd created only once:

const Date& default_date() {
    static Date dd{Year{2001}, Month::jan, 1};

    return dd;
}

issues

• CLion gets wrong CMAKE_OSX_SYSROOT value
• ofstream doesn't flush