在C ++中将double *转换为int *

Question

The title's pretty self explanatory. I want to cast a type double * into a type int * . I realize that I can use the C-type cast (int *) to do what I want, but is there a way to do this cast using C++ type casting ie static_cast etc?

Answer 1

You can perform this cast using a reinterpret_cast :

int* veryUnsafePointer = reinterpret_cast<int*>(myDoublePointer);

Be aware that this does not give you back an integer representation of the double being pointed at; instead, the integer's value will be dependent on the binary representation of the double and the endianness of the system.

Hope this helps!

Answer 2

You need to use reinterpret_cast<int *>(ptr) .

I hope you really know what you're doing though. There's very little reason to do such a cast, especially when it's likely a double and an int are different sizes.