Hex to dec conversion for large numbers

[Alex Vinokur]

I am looking for an algorithm/method which enables to convert very large
hexadecimal numbers to decimal numbers.

Here is what I would like to do.

string hex_str = "123456789abcdef0.........."
string dec_str = <the same number in decimal represantation>

 

[Karl Heinz Buchegger]

I am looking for an algorithm/method which enables to convert very large
hexadecimal numbers to decimal numbers.

Here is what I would like to do.

string hex_str = "123456789abcdef0.........."
string dec_str = <the same number in decimal represantation>

What I would do:
Get a copy of a Big Integer library.
Then the rest is easy:

Total = 0;
while( hex_digit_available )
Total = Total* 16 + decimal_representation( hex_digit );

Convert Total to a string

 

[Basil]

What I would do:
Get a copy of a Big Integer library.
Then the rest is easy:

Total = 0;
while( hex_digit_available )
Total = Total* 16 + decimal_representation( hex_digit );

Convert Total to a string

Is there Big Integer library - Multiprecision unsigned number template
library (MUNTL).

http://sourceforge.net/projects/muntl/

Big Integer of library have member for convert in to/from hex string.
This is one half of your task.
Unfortunate now it have not member for convert in to/from dec string.
But you can write this convertor himself This is very easy.

Thank
Basil