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;

Integers are printed as decimal by default. Could be your problem is actually _inputting_ hexadecimal numbers? I.e. as in this question: http://stackoverflow.com/questions/11031159/converting-hexadecimal-to-decimal — jogojapan, Jul 22 '13 at 06:25

juanchopanza · Answer 1 · 2013-07-22T06:28:34.170

5

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.

edited Jul 22 '13 at 06:28

answered Jul 22 '13 at 06:22

juanchopanza

223,364
34
402
480

score 3 · Answer 2 · answered Jul 22 '13 at 06:24

3

Don't use the std::hex manipulator?

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

answered Jul 22 '13 at 06:24

Some programmer dude

400,186
35
402
621

Ok. How to enter hext number in console? Using char or int? – user2605734 Jul 22 '13 at 06:32
1

@user2605734 Did you look at the question I linked? Doesn't it answer that? – jogojapan Jul 22 '13 at 06:34
@user2605734 `char` is for single characters, `int` is for normal integers (within its specified range) – Some programmer dude Jul 22 '13 at 06:45

Converting hex to dec C++

2 Answers2