将struct转换为unsigned char*

Question

如何将以下内容转换struct为unsigned char*？

typedef struct {
    unsigned char uc1;
    unsigned char uc2;
    unsigned char uc3;
    unsigned char uc5;
    unsigned char uc6;
} uchar_t;

uchar_t *uc_ptr = new uchar;
unsigned char * uc_ptr2 = static_cast<unsigned char*>(*uc_ptr);
// invalid static cast at the previous line

Answer 1

你不能在static_cast这里使用,因为类型之间没有关系.你必须使用reinterpret_cast.

基本上,static_cast在大多数情况下应该使用a ,而reinterpret_cast应该让你质疑为什么你这样做.

这是您可以使用的时间static_cast:

class Base {
};

class Derived : Base {
};

Base* foo = new Derived;
Derived* dfoo = static_cast<Derived*>( foo );

而这里你可能需要一个reinterpret_cast:

void SetWindowText( WPARAM wParam, LPARAM lParam )
{
   LPCTSTR strText = reinterpret_cast<LPCTSTR>( lParam );
}