How do I have math functions go beyond 15 decimal places? 1

[VBidiot]

I have to make a Pi program to calculate to 30 000 decimal places in school but since I'm an idiot I can't go past 15 decimal places. Somebody help me please.

 

[chiph]

Hi VBidiot!<br>
<br>
A book every programmer should have is 'Practical Algorithms for Programmers' by John Binstock and John Rex. It contains algorithms for trees, linked-lists, sorting, searching, date/time functions, and arbitrary-precision arithmetic. It's written for C programmers, but you ought to be able to glean the concepts and use them in VB.<br>
<br>
The key to arbitrary-precision arithmetic is to declare two fixed-length strings. Decide some position to be the decimal point. Write functions to add, multiply, and divide (subtraction is a special case of addition) the individual positions of the string. So if you have stored:<br>
<br>
string A: 0 0 0 1 2 ^ 3 4<br>
string B: 0 0 0 0 9 ^ 0 0<br>
<br>
To add these, you would work your way right-to left, adding the columns and carrying as needed. Multiplication and division are left as exercises to the reader &lt;grin&gt;.<br>
<br>
Chip H.<br>
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