C++ Runtime Library Info

/** * @brief Adds two numbers. * * @param a The first number. * @param b The second number. * @return double The sum of a and b. */ double add(double a, double b);

Contrary to popular belief, a program's execution does not start directly at main() . Instead, the runtime library performs several critical setup tasks first. Runtime Library - an overview | ScienceDirect Topics c++ runtime library