Sam Varshavchik questions

Sam Varshavchik answers

• Difference between x * 0.1 and x / 10?
• When should I use a mutex with std::shared_ptr in C++ multithreading?
• C++ character concatenation with std::string behavior. Please explain this
• strange behavior of std::string assign,clear and operator[]
• How to call a method from a forward declared class?
• Is there a workaround for using typeid and typeinfo in different version of g++ compiler?
• reinterpret_cast between integers and pointers (of same and of different sizes)
• C++ overload >> operator with different interaction based on which side of >>
• Replace a variable of a type with const members
• How to run a command as root with C or C++ with no pam in linux with password authentication