How to obtain bits from a data type on C++?

Question

I want to know if there is some library where I can obtain the bits from an int or unsigned char or any data type. I know that I can use sizeof (), but that returns in bytes, is there a function where do the same work that sizeof() but returning the result in bits? I don't want to obtain a bunch of 0s and 1s, a char is 8 bits, int 32 and so on... I cannot find a function where returns in bits.

Answer 1

If sizeof returns the size in bytes, and one byte has 8 bits, then:

bits = 8*sizeof(x)