Hi Michael,
>Is the int('A') a function call provided by C++ library or the compiler will do the conversion during compilation time ?
I might be getting the terminology wrong, but here goes anyway...
The int('A') is a constructor cast. For me, I prefer it to the C style cast, ala (int)'A'. Especially in the kind of situation in your example.
I'm not sure what the general consensus is amongst the C++ developer community regarding constructor casts, but I do know that there is a general disdain of C style casts. The recommendation by the C++ gurus is to prefer static_cast, const_cast, dynamic_cast, and reinterpret_cast ... and I presume that constructor casts would be right up there as well.
HTH,
--Eljay
