Converting hex to dec C++

问题

Convert to hex:

cout << hex << int(x) << endl;

How to convert conversely, from hex to dec?

Enter hex number simple:

cin >> hex >> x;

回答1:

You can use the std::dec IO manipulator:

std::cout << std::dec << int(x) << endl;

Note that this is only necessary if you have previously used std::hex or other means to manipulate the base of std::cout. Otherwise you need take no action: the default for an int is decimal.

回答2:

Don't use the std::hex manipulator?

std::cout << int(x) << std::endl;

来源：https://stackoverflow.com/questions/17781115/converting-hex-to-dec-c