C - Programming: no ios stream library should be used. Your code should be able to work for "code blocks"

Q1. Read from console input a string (length < 100) and print the length of its longest common substring.

Eg: Input: abcdxyzefgabcdxyefxyz Here the common substrings are substrings that appear more than one times in the given input.

So in this example, the common substrings are abcd, xyz and ef.

Your output should be 4 since the longest common substring is abcd. Hint: rank the prefixes.

The output should be able to display the longest common substring.