how can I extract the mantissa of a double

Question

I would like to store in a variable the mantisssa of a double

I have post a code to get the binary representation of a double : click here

What should I chan

Answer 1

The code here is a bit dangerous in terms of portability, but here it is...

#include 

float myFloat = 100;
int32_t mantissa1 =
    reinterpret_cast(myFloat) & (((int32_t)1 << 24) - 1);

double myDouble = 100;
int64_t mantissa2 =
    reinterpret_cast(myDouble) & (((int64_t)1 << 53) - 1);