Remove identical, consecutive lines in a char array in C

Question

I\'m trying to create a function that will detect if there are consecutive lines in a char array that are identical.

For example, if a char array contained:

Answer 1

Some guidance:

• You only ever to copy each character at most once - backwards, to its destination. No need for extra copies.
• You'll have a "finalized up to here" position in the array and a "being processed/read" position.
• Keep track of the current full-line which may be duplicated, and match each new line against it to check whether it's a dupe.
• Advance by full lines rather than by characters - except when looking for the next end-of-line.