我正在完成 BS 的"A Tour of C++"，并且正在重新创建他在整个过程中使用的 Vector 类，至少是前四章。. type cast error DWORD to PVOID - C++ Forum Examples on How static_cast Method Works in C++ - EDUCBA 1. const_cast. error: invalid static_cast from type 'xxx*' to type 'yyy*' - CSDN . The static_­cast operator shall not cast away constness. Ganon you have mistaken a type name for an unnamed enum, in fact the exact reverse of what you postulate has happened, i.e. This can cast related type classes. The pointer p should be used just with the variable name p, No asterisk. A void pointer can hold address of any type and can be typecasted to any type. The static_cast operator converts a null pointer value to the null pointer value of the destination type. The C++ static_cast is defined as the operator which has to convert the variable from one data type into another data type mainly it transform into float data type the compiler only done this conversion in the static_cast because it constantly focus on the const types like const_cast, reinterpret_cast it also casting from one type into another type same like . It also looks like you are trying to cast whatever value values holds + i into a void*. Applying the static_cast operator to a null pointer converts it to a null pointer value of the target type . SingleLevelLogicalUnitNumber.cpp:37: error: invalid static_cast from type `scsi::LogicalUnitAddressingField' to type `const scsi::PeripheralDeviceAddress&' The code section in question is the following: [.] Explanation: In the above example, we try to cast the char* to type int*, an invalid conversion. I can't just change myBytes to type char, can I? Understanding C++ Casts. It can also convert between enumeration types. char ch = 65; chars ARE ascii. nullptr vs NULL. This is also the cast responsible for implicit type coersion and can also be called explicitly. Approach: Invalid Cast - Int64 to Int32 - social.msdn.microsoft.com The void pointer, also known as the generic pointer, is a special type of pointer that can be pointed at objects of any data type! static_pointer_cast - C++ Reference - cplusplus.com integer constant zero with C-style typecast to void*, while nullptr is prvalue of type nullptr_t, which is an integer literal that evaluates to zero. result = (T)(Int64)value; But I cannot do this in the generic method. NULL is 0 (zero) i.e. valid. Compiler Error C2440 | Microsoft Docs compiler error: invalid conversion int to int* 2 ; Updating a record in a file 9 ; error: invalid use of void expression 4 ; This casting operator is basically a substitute for normal casting operator. 我在构建 Vector 构造函数的第二个版本时遇到了障碍，使用了 std::initializer_list。static_cast<int> 用于将size_type 转换为int，因此可以初始化我的Vector 的sz。 但是，由于某种原因，当我尝试在我的 . I have created a small example here. NULL is 0 (zero) i.e. [expr.static.cast] - GitHub Pages The static_cast operator converts variable j to type float .