Converting hex to dec C++

Question

Convert to hex:

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

How to convert conversely, from hex to dec?

Enter hex number simple:

cin >> hex >> x;

Answer 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.

Answer 2

不要使用std::hex操纵器？

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