Is there an alternative approach to perform the conversion? It also looks like you are trying to cast whatever value values holds + i into a void*. It would be incorrect, if we assign an address of a float variable to a pointer of type pointer to int. Well, let us start with C. The official "bible" of C, "The C Programming Language, 2nd edition" by Kernighan and Ritchie states in section A.6.8: Any pointer to an object may be converted to type void* without loss of information. Dynamic_cast and static_cast in C++. C++ static_cast from float** to void** - Stack Overflow Because widening conversions are always safe, the compiler performs them silently and doesn't issue warnings. During value or variable assignment to a variable, it is required to assign value or variable of the same data type. can we type cast an integer as (void *)x.. Like can I return a value (void *)x) 12 posts views Thread by Abhishek | last post: by Animal a = g; // Explicit conversion is required to cast back // to derived type. Type Casting and Type Conversion In C++: Part 2 | Coding Ninjas Blog Approach: warren631 October 30, 2015, 5:59pm #1. static_cast in C++. Learn C++ - Enum conversions. static_cast和dynamic_cast是C++的类型转换操作符。编译器隐式执行的任何类型转换都可以由static_cast显式完成，即父类和子类之间也可以利用static_cast进行转换。而dynamic_cast只能用于类之间的转换。那么dynamic_cast的存在还有什么意义呢？因为dynamic_cast提供了一个重要的特性：运行时类型检查来保证转换的 . Other uses are, at best, nonportable. SingleLevelLogicalUnitNumber.cpp:37: error: invalid static_cast from type `scsi::LogicalUnitAddressingField' to type `const scsi::PeripheralDeviceAddress&' The code section in question is the following: [.] Giraffe g = new Giraffe (); // Implicit conversion to base type is safe. The result of a reference const_cast refers to the original object if expression is a glvalue and to the materialized temporary otherwise (since C++17). invalid, must use '& ' before x and write p=&x; *p = 56; or write p = new int; c.) invalid, must use '& ' before x we cannot declaration the pointer only by 0 or null.