Single, double quotes and sizeof('a') in C/C++

Question

I was looking at the question Single quotes vs. double quotes in C or C++. I couldn\'t completely understand the explanation given so I wrote a program:

#include         


        

Answer 1

In C, character constants such as 'a' have type int, in C++ it's char.

Regarding the last question, yes,

char ch = 'a';

causes an implicit conversion of the int to char.