Thread: big numbers in C

helloi am an amateur programmer in C!and i faced to a new problem and need help to resolve.this is my problem :i want to input big number(for example a number with more than 100 digits) in c.although long double can carry 18digits number,what data type i should use???in another words, i wand to make about 10000 psuedo random number with a random number maker and sort them using a sorting algorithm like shell sort.and i don't know how can i keep big numbers created with psuedo random number maker!!!also i don't want use arrays!so, what should i do????

There is currently no big number support in the common C standards. However, there are many bignum libraries available, such as The GNU MP Bignum Library.

Hopefully you have the experience to know how to use libraries in conjunction with your compiler setup. If not, google around for tutorials.

If you want to do it withour a library, you'll have to use arrays. If all you really want is 10000 100-digit numbers sorted in a file, you could just create 10000 100-character strings of random digits and sort that.

What is a number? "Impetuous fire"

What is an array? "Ice and desire"

No, that's Romeo and Juliet!
(youth and maid)

Numbers are just digits, arranged in order. WE give those digits meaning with concepts like the "number line" and "base 10" (2, 16, etc.).

So numbers are made up of nothing but arranged digits - so an array of digits, be it type int or char, is perfectly in harmony with numbers.