In pratice, the approach of separate RNGs with different seeds for threads/processes is widely used (even though theoretically those RNGs might have overlaping sequences, which is undesirable). For more discussions on this approach, please refer to The Rust Rand Book - Parallel RNGs and Seed Many RNGs in Rust . The …

Collections

1. Prefer std::deque to std::vector when the size of the collection is unknow.

2. Suppose set A and B are two set with the same type and set C is another set with the same value type but a different comparison function, then it is still valid to insert …

1. Boolean expressions are evaluated from left to right (the same in Java), so it is totally OK to write code like

   if(a < x.size() && x[a]){
       ...
   }
   

   where x is a vector.

2. There is no &&= and ||= operators in C++, instead you can use &= and |=. Though &= and |= are not specially for …

A few days ago I found someone asking an interview questions on mitbbs. The question is as follows. A gambler plays a fair game and bet 1 dollar each time. If he lose all his money, the game stops. Suppose he has 10 dollars and is only allowed to play …

Illustrative examples for the following discussions can be found here.

1. It is suggested that you also provide a default constructor if you ever provide a user-defined constructor when writing a C++ class.

2. If you want to allow deleting a derived class from a pointer of the base class, you have …

Check the io directory on the page https://bitbucket.org/dclong/cpp-learn/src for some illustrative examples for the following discussions.

1. You can format output of numbers using functions std::setpresicion and std::setw in the header.

2. When you read data from a file into an array or write data …