Write this program in C please. The other programs do not work properly.

Write a program that allows the user to enter two positive integers and outputs their sum. Sounds simple? Here's the catch: The numbers may be any size! They may be way too large to store in a single variable. You may not assume any particular maximum number of digits. Here are two sample runs: Your homework will be graded out of 100 points with the following breakdown: Correctness: You should follow all instructions exactly as stated above. Elegance and Efficiency: You should use the concepts we have learned in class to write simple, elegant code. Use functions to structure your program in a well thought out manner. Format: Your code should use indentation and other spacing that makes the code readable and easy to understand. Comments: You should include one comment at the top of the program explaining what it does, one at the top of every function you write, and some within the code explaining how things work whenever it isn't obvious