organising the programs

• the api/declarations reside in a .h file with proper function description/documentation
• the implementation resides in a .c file
• keep the line as long as possible, don't break things where not neccessary.

good programming habbits

• always free after malloc, then use malloc to check for leaks
• function declaration and implementation order should match in header and source file.
• don't use typedefs where not neccessary.

coverage

• binary trees (normal/avl/others)
• linked lists (single/double)
• stack, heap and queue
• matrix
• trie and hashmap