> go to project repository.
> cd project.
> ./make project
> give expression....

This implemented bc command is only valid for integers of any length.
It does the addition,multiplication,division,substraction,modulus of very big intgers.
It also solve infix expressions of big integers like bc command. 
It also does the conversion of the base of 10 to the base of 16.
It is very easy to use on commandline.
For the implementation i used the doubly linked list, which consist of nodes which stores the 4
digits of big integer in the form of string.

-Vijesh Bhikaji Ghandare