You can use hexadecimal floating-point literal format that introduced in the C language since C99[^1]. [^1]: https://cppreference.com/w/c/language/floating_con

You can use hexadecimal floating-point literal format that introduced in the C language since C99[^1]. [^1]: https://cppreference.com/w/c/language/floating_constant.html https://cppreference.com/w/c/language/floating_constant.html For example, `0x1.2p3` represents `9.0`.