Question

C language program.

How could I use bitwise opreation "and" to two float variable?

If it is impossible, please show another way to achieve the same goals.

Answer 1

It is not possible because there's no such thing as "bitwise operation on floating-point numbers". Bitwise operations in C/C++ work on value-representation of a number. And the value-representation of floating point numbers is not defined in C/C++. Floating point numbers don't have bits at the level of value-representation, which is why you can't apply bitwise operations to them.

You can analyze the bit content of the raw memory occupied by the floating-point number. For that you need to either use a union as suggested below or (equivalently, and only in C++) reinterpret the floating-point object as an array of unsigned char objects, as in

float f = 5;

unsigned char *c = reinterpret_cast<unsigned char *>(&f);