If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)

Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie

Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Binary, Octal, Hex and Decimal conversions??

Nappy · 2009-04-17 07:50:51

Hey im studying c++ and was wondering how to convert from binary to hexadecimal to octal and vice versa. Just studying for test in a month and need serious help on the subject... Thanks..

17-04-2009 7:50am

#1

Nappy

Registered Users, Registered Users 2 Posts: 329 ✭✭

Join Date: June 2008

Posts: 235

Hey im studying c++ and was wondering how to convert from binary to hexadecimal to octal and vice versa. Just studying for test in a month and need serious help on the subject... Thanks..

0

Comments

#2 17-04-2009 7:54am

--amadeus--

Closed Accounts Posts: 5,096 ✭✭✭

Join Date: July 2006

Posts: 4677

Have you had a chance to read teh charter?

Try this as well.

0
#3 17-04-2009 9:21am

DublinDilbert

Registered Users, Registered Users 2 Posts: 5,401 ✭✭✭

Join Date: July 2006

Posts: 5162

Nappy wrote: »

Hey im studying c++ and was wondering how to convert from binary to hexadecimal to octal and vice versa. Just studying for test in a month and need serious help on the subject... Thanks..

From your question it is not clear what you want to do. Before you can do anything in programming you need to have it clear and express it in plain english.

Do you want to convert an integer variable into a string representation of different bases (binary, hex & octal)? And convert a string representations of a number (with binary/hex/octal) back to an integer?

There's various ways you can do this, are you supposed to code the conversion from scratch or use libraries?

The binary conversion is very easy to do from scratch, with a for loop and some bit shifts.

The hex conversion is easy enough too you can use the %x in a printf, or use std::hex in a cout statement. I think think you can also use std::hex in a cin or a buffered string also, to do the opposite conversion.

0
#4 17-04-2009 9:25am

Malice

Registered Users, Registered Users 2 Posts: 15,065 ✭✭✭✭

Join Date: August 2004

Posts: 14218

Nappy wrote: »

Hey im studying c++ and was wondering how to convert from binary to hexadecimal to octal and vice versa. Just studying for test in a month and need serious help on the subject... Thanks..

Did you try Google? Also I think you should have taken note of what the mod posted on your last thread.

0
#5 17-04-2009 7:37pm

Hobbes

Registered Users, Registered Users 2 Posts: 21,264 ✭✭✭✭

Join Date: February 1998

Posts: 18308

There are probably APIs for doing it but the easy way if you had to write your own is to create a lookup table. Base 2 to Base 26.

0
#6 18-04-2009 6:39pm

Evil Phil

Registered Users, Registered Users 2 Posts: 7,468 ✭✭✭

Join Date: March 2001

Posts: 6624

:mad:

0
Advertisement

This discussion has been closed.