Type conversion in C ++

The types in C ++ include four types: static_cast, dynamic_cast, const_cast, and reinterpret_cast. Four types of reinterpret_cast: Forced type conversion operator, modifying the operand type, giving the object's BIT model without binary conversion; Use with caution; static_const: the conversion between the parent class and the Child class between classes. It is safe to convert the pointer or reference of the parent class to the base class. In turn, it is not safe. Conversion between basic data. Compared with reinterpret_const, static_const can be converted to binary values. It is basically the same as the C-style () Conversion Function. const_cast: const is converted to non-Const. dynamic_const: conversion between parent classes and child classes between classes ,When the class hierarchy performs upstream conversion, the effect is the same as that of static_const. Dynamic_const performs a dynamic check. The base class must contain virtual functions, but static_const does not. Both dynamic_const and static_const fail during the downstream conversion, but dynamic returns NULL, while static_const is incorrect at the Compilation Time, which fully indicates a dynamic moment check and a compilation time error.