Chapter 2

1. Typically, the main() function has two parameters, argc and argv, where argc is the number of input arguments to the program and argv constitutes those input arguments. Very occasionally, you can see a widely supported, but not standardized, third argument, most commonly named envp. The type of envp is an array of char pointers and it holds the environment variables of the system.
2. The constexpr specifier declares that the value of the function can be evaluated at compile time. The same definition applies to variables as well. The name consists of const and expressions.
3. Recursion leads to the allocation of additional space for function invocations. It is expensive to allocate space for the function and call compared to an iterative solution.
4. The stack holds objects with automatic storage duration; that is, programmers do not concern themselves with the construction...