reinterpret-cast的用法
时间: 2023-07-08 16:15:44 浏览: 81
reinterpret_cast is used to convert one pointer type to another, or to convert a pointer to an integral type. Its syntax is as follows:
```
reinterpret_cast<new_type>(expression)
```
Here, `new_type` is the desired type of the result, and `expression` is the value to be converted. The most common use case for `reinterpret_cast` is to convert between types that have the same size and representation in memory, such as pointers to `void` or `char`. For example, to reinterpret a pointer to an `int` as a pointer to a `char`, you could do the following:
```
int* my_int_ptr = ...;
char* my_char_ptr = reinterpret_cast<char*>(my_int_ptr);
```
This would reinterpret the pointer to `my_int_ptr` as a pointer to `char`, allowing you to access the bytes of the integer value directly through the `char` pointer.
It's important to note that `reinterpret_cast` is a powerful tool that can be dangerous if used improperly. It should only be used when you are absolutely sure that the conversion is safe and well-defined.