Makefile - Use make command to makefile.(Input: input.txt, Output: output.txt)
homework.c - Main program, use stdin to input data, and it have add,
insert, append and del option, print the output result to stdout.
list.h - The <linux/list.h> header v4.18.14.
list_private.h - Define the functions and struct for list.h
operator.h - Define the function interface and struct.
operator.c - Implement the operator functions.
Usage:
cat <input file> | ./<program name> > <output file>
Input file command:
add <str>:把str加到link list的尾巴
insert <match> <str>: 在找到的match前，加入str
append <match> <str>: 找到的match後，加入str
del <str>: 在link list中，找到str，並刪除