convert from long long to int and the other way back in c++

Question

How to convert from long long to int and the other way back in c++ ?? also what are the properties of long long , especially its maximum size, thank in advance ..

Answer 1

Type long long is typically 64 bits.

Type int is likely to be 32 bits, but not on all machines.

If you cast an int to a long long, you can do

my_long_long = (long long) my_int

and it will be just fine. If you go the other direction, like

my_int = (int) my_long_long

and the int is smaller than 64-bits, it won't be able to hold all the information, so the result may not be correct.