200 digit number!!!!! READ
 

how to perform addition substraction on a 200 digit number in 'C'?????
how to read that big number??
i have to do it in float.
someone spoke of 'big float', wat is that??

Re: 200 digit number!!!!! READ
 

Try using a Linked List , the Node can have the Digit, the carryover,....

Its a simple program.

Re: 200 digit number!!!!! READ
 

You can't do it with the built-in types; you will have to implement your own. One way is to represent the numbers with strings, e.g.
which will retain its accuracy as long as you want it to (i.e. there is no conversion to binary).

Adding/subtracting numbers will be just an implementation of how you did this back in school. Remember doing sums like this one?
12345
2008+
=====

5+8 is 13, carry 1 and write 3. 4+0+1 is 5. And so on.