How to use reinterpret_cast in C++?

Question

I know the reinterpret_cast in C++ can be used in this way:

float a = 0;
int b = *reinterpret_cast(&a);

Bu

Answer 1

You can't reinterpret_cast in the case you give because reinterpret_cast takes only either a int to convert to a pointer, or the reverse, and follows additional similar rules.

There is a summary of these rules there: http://en.cppreference.com/w/cpp/language/reinterpret_cast