# Questions tagged [number-systems]

Questions about representing numbers in alternative representations, such as hexadecimal or Mayan

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### Base conversion [closed]

I wrote a base conversion program. This base conversion should also work with base 1 (unary) where 000 is 3 and 0000000 is 7 and so on. It is only for non-negative numbers. ...
1k views

### Decimal to Binary Conversion and vice-versa in Python

Given a decimal number I need to convert it into binary Given a binary number I need to convert it into decimal After the conversion I need to perform some operation on it (for example, addition). I ...
74 views

### Android UI for converting numbers from base system x to base system y

As a complete beginner, I didn't care about how the code looked as long as it works. However, now I am starting to think about how to make code be more maintainable and easier to read. I feel I have ...
292 views

### Converting an integer to Greek and Roman numerals

Yesterday I posted a question about converting an integer to it's Roman Numeral equivalent. Apparently you guys liked it and gave me some good advice, so I decided to take all your advice, and go a ...
1k views

### Implementing my own Integer.toBinaryString(int n) method

Our senior developer gave us (trainees/jr. developers) a small exercise and that is to make our own Integer.toBinaryString(int n) implementation. This is the answer ...
40 views

### Filtering out neighboring ascending digits in quaternary numeral system

Take in a natural number n ∈ N, then process and output a(n), with a(n) being the number of quaternary strings (with 0, 1, 2, 3) of length n, where (from left to right) there never follows a character ...
351 views

### Converting bits to decimal (integer) string is so slow

I am implementing myself a BigInteger class. It can natively handle very very big digits in very short time. ...
6k views

### Base 10 to Base N conversion

Before I begin using this code in vital systems, I wanted to quadruple-check that it was soundproof. I plan to implement this as part of a larger program, obviously not by itself. Are there any clear ...
449 views

### Program for binary to decimal and vice versa

I started to learn C a week ago and this is my culminating program of what I've learned but I could use a few pointers. ...
800 views

### Base N To Decimal Converter

Problem Implement a base N to base 10 (decimal) converter, where N is between 2 and 36 inclusive. Implementation Am I over-complicating things in ...
832 views

### Hex to Binary Conversion

Just mucking around with Elixir and bitstrings and wondering if there is a better way to implement the following ( or improve ). :- ...
839 views

### Binary to decimal converter in JavaScript

This exercise with a test suite is from here. I did not intend to use ES6 features, it's plain old JavaScript. That's why I seek advice more on the good practices, performance side, than modern syntax....
284 views

### The base-ten value of n-base number with Python

To start off I'd like to note I am aware of int(val, base). My goal was to write a short function capable of taking in a base int...
166 views

### Python Decimal to Binary converter

There is no input validation for this, but that aside, I would appreciate it if anyone could help me improve the logic of this script. ...
765 views

### Python binary to decimal converter

Any ideas how I could improve this? I already know that there is no checking for anything other than a 1, so you can enter a 2 ...
2k views

I solved this exercise of displaying a table of numbers from 1 to 256 in binary, octal and hexadecimal. I made this program to convert from decimal to binary and took that binary number to convert to ...
70 views

### Subtraction in a spreadsheet column numbering scheme

The idea of the algorithm is to decrease a number from a word. Is there a better way to write this algorithm? limitiation: it is important to decrease with a limit, if BB is the word we decrease ...
4k views

### Converting decimal integer to binary string

I'm wondering how I can make this function better, more compact, even faster. ...
929 views

### Program to convert binary to hex

I wrote this program to convert binary to hex, it ignores other characters between the binary digits. I would like to receive any recommendations on how to improve it. ...
144 views

### Convert integers into binary

I've made a very simple program that takes integer number arguments either with plus/minus sign or without them, and print the number in binary format. binary.c ...
35 views

### Base Changing in Java, improved version

This is a follow up to my previous question, Base-changing numbers in Java I have followed @Pimgd's advice in the answer to that question, and I'm posting the improved code for any further review. ...
102 views

### Base-changing numbers in Java

On a whim, I came up with this program to act as a helper class for base changing, if I require it in the future. It was made to support fixed-point and negative inputs, but they are basically a hack. ...
60 views

### itoa with “method of complements” for negative numbers in ANSI C

I have enhanced my itoa implementation, taking the advise from my previous simple itoa implementation in addition to handling multiple radixes and negative numbers other then just base 10. Looking for ...
564 views

### Decimal number to binary number conversion in JavaScript

I made this decimal to binary conversion as an exercise for myself and because it is obviously often asked during job interviews / tests. Any hints concerning possible improvements welcomed. <...
9k views

### JavaScript function to convert decimal number to binary

I was recently asked this in an interview for a front-end position and I came up with something like the code below, which seems to work but is clunky. (...
95 views

### Multiple base numbers parser

This code is a Parser that parses numbers according to R5RS. #b1001 - binary #o2127 - octal #h02d - hexadecimal #d1231 - decimal 3923 - decimal It is working ...
625 views

### Hex-to-octal converter

The code converts hexadecimal into octal. The function is working, but it takes more than a second to process the input. How can I optimize this? ...
3k views

### Convert decimal to binary and vice-versa in Java

I'm trying to learn Java, so I'm doing a few exercises from a programmer project idea book. This exercise requires that the program be able to convert a decimal number to binary and vice versa, like ...
1k views

### Arabic to Greek numeral converter, 1 - 10

One of the things that's straight-forward in JavaScript is Unicode support. If you want to return ϝ (lowercase digamma, not a simple ...
249 views

### Converting hex to integer

What's the fastest way of doing this? ...
2k views

### Function to convert a decimal number as a string to hexadecimal

I am designing a cipher and need to convert between bases repeatedly in a loop. I have optimized everything else, but I'm not too familiar with C++ code, and and am trying to figure out how to make ...
4k views

### Java conversion of base 16 to base 64

I wrote a solution in Java to solve the problem here. I use BigInteger to convert first from base 16 to base 10, then base 10 to base 64. This seems quite ...
13k views

### Hexadecimal number to decimal conversion

I am a semi-beginner in C++ and I have a project in C++ to convert a hexadecimal integer into decimal equivalent, but I extended it and now this program can also convert a fractional part. Logic I ...
17k views

### Conversion functions between binary, hexadecimal and ASCII

I've written a small suite to easily convert my data between binary, hexadecimal and ASCII: ...
19k views

### Hex to Decimal converter

Any feedback is welcome: ...
7k views

### All-in-one number base converter

I coded this program as a challenge for /r/dailyprogrammer. Basically this program can convert any number from any base to another base including negative bases as long as the input is coherent. Did I ...
2k views

### Excel-like column numbering

I have a working code (below) to convert a number to Excel-like (A...Z AA...AZ BA...BZ ...ZA-ZZ) column codes (headers). For ...
21k views

### Excel column string to row number and vice versa

Excel column letters to actual numbers, if you recall, Excel names its columns with letters from A to Z, and then the sequence goes AA, AB, AC... AZ, BA, BB, etc. You have to write a function that ...
4k views

### Decimal/binary/hex converter

I've finally finished my converter and have determined that it works, but I'm trying to make it cleaner and/or more practical (primarily with the switch statements)....