c++ - Why is a boolean 1 byte and not 1 bit of size?

Question

In C++,

• Why is a boolean 1 byte and not 1 bit of size?
• Why aren't there types like a 4-bit or 2-bit integers?

I'm missing out the above things when writing an emulator for a CPU

Answer 1

Because the CPU can't address anything smaller than a byte.