Getting hex through Cin

Question

Why doesn't this code work?

int x;
cin >> x;

With the input of 0x1a I get that x == 0 and not 26.

Why's that?

Answer 1

I believe in order to use hex you need to do something like this:

cin >> hex >> x;
cout << hex << x; 

you can also replace hex with dec and oct etc.

Answer 2

Actually, You can force >> operator to get and properly interpret prefixes 0 and 0x. All you have to do is to remove default settings for std::cin:

std::cin.unsetf(std::ios::dec);
std::cin.unsetf(std::ios::hex);
std::cin.unsetf(std::ios::oct);

Now, when you input 0x1a you will receive 26.