# Program Using Arrays To Conver Binary to Decimal and Decimal to Binary.

• 11-19-2013, 11:00 PM
CreatingDrake
Program Using Arrays To Conver Binary to Decimal and Decimal to Binary.
I am in a AP Computer Science class and have an assignment that I have NO CLUE how to do. I will post the instructions below. Can someone throw together a fast code that I can base mine off of please.
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In this project, we’re going to revisit the concept of binary numbers and base conversions with the use of arrays. The goal
is going to be to design a program that will ask the user if they would like to convert from binary to decimal (or vice versa),
and the program will generate the appropriate output.
Create a Java Project in Eclipse called Binary Numbers. Create a class called BinaryNumbers, and make sure it has
the main method.
There are several algorithms for converting a decimal number to binary, but the one most commonly used seems to follow
this strategy:
Decimal Number: 170
Largest power of two not exceeding the decimal number: 128
Is 128 in 170? Yep! Put a 1 in that place and subtract 128 => 42
Is 64 in 42? Nope.
Is 32 in 42? Yep! Put a 1 in that place and subtract 32 => 10
Is 16 in 10? Nope.
Is 8 in 10? Yep! Put a 1 in that place and subtract 8 => 2
Is 4 in 2? Nope.
Is 2 in 2? Yep! Put a 1 in that place and subtract 2 => 0
We’re down to zero left, so we must be done!
• 11-19-2013, 11:25 PM
Norm
Re: Program Using Arrays To Conver Binary to Decimal and Decimal to Binary.
What have you tried? - Matt Gemmell

Post your code and specific questions about the problems you are having?