Chapter 25 // Exercise 9 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2019 and a modified version of the std_lib_facilities header found here.

Chapter 25 // Exercise 9

Without using any standard headers (such as <limits>) or documentation, compute the number of bits in

an int and determine whether char is signed or unsigned on your implementation.

Github: https://github.com/l-paz91/principles-practice/blob/master/Chapter%2025/Exercise%209

So to print the number of bits in an int we know that sizeof() will return us the number of bytes in a type so you can just multiply that by 8. I don't think this is cheating as sizeof is a keyword in C++ and doesn't require any standard headers to be used. 

For the second part, I used the example from page 964. It shows that char is default signed on my machine.