converting from any base(16 8 2) to base 10 in C#

Question

Hi there Could anyone help me with the following problem ? Suppose I have a textBox in which there can be introduced any string representing a number in one of the following bases: 16 8 2 Suppose again that I have more radio buttons : hex dec oct bin. When one of them is checked the number written in the textBox would be converted to the proper base (hex - to hexadecimals etc.) I want to convert the number in the textBox to base 10 (of course the modified number will be displayed in the textBox). The function that performs the conversion to base 10 doen't know the initial number's base ! How can I do this ? Please help me ! Please answer by tomorrow ! I've searched the net and found nothing appropiate ! :( I'm in desperate need of help !:( Thankx . Cheers Adisor P.S. To those who celebrate Easter I wish them : Happy Easter !!! :)

joy.simpson · Answer

First of all it is not possible to translate a number from another base without knowing what the base is. You could examine each digit in the string and eliminate the higher base if any digit exceeds the maximum allowed value. The remaining base is the one you would need to work with to translate into decimal. Here is some rough code part of a much larger program I wrote years ago in QBASIC. You will have to puzzle out the rest for yourself and translate it to C#. An array is declared for each character in the string. The For loop translates each character in the string to base 10 and then concatenates it. DIM B AS INTEGER 'number base DIM R AS INTEGER 'number of digits DIM P AS INTEGER 'place value position starting with 0 DIM S AS DOUBLE 'value of single digit DIM N AS DOUBLE 'decimal value of number R = LEN(digit$) DIM D(R) AS INTEGER FOR P = 0 TO R - 1 S = D(P) * B ^ P N = N + S NEXT P

converting from any base(16, 8, 2) to base 10 in C#