Single, double quotes and sizeof('a') in C/C++
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.
because there is no char just intgers linked int a character
like a is 62 i guess
if you try printf("%c",62); you will see a character