To better understand how RAII works, we must first examine how a class in C++ works as C++ classes are used to implement RAII. Let's look at a simple example. C++ classes provide support for both constructors and destructors as follows:
#include <iostream>#include <stdexcept>class the_answer{public: the_answer() { std::cout << "The answer is: "; } ~the_answer() { std::cout << "42\n"; }};int main(void){ the_answer is; return 0;}
This results in the following when compiled and executed:
In the preceding example, we create a class with both a constructor and a destructor. When we create an instance of the class, the constructor ...
