prepare (1/3): 
finished

make (2/3): 
g++ -g -Wall -O2 -c HW5LINUX.cpp
HW5LINUX.cpp: In function 'int main()':
HW5LINUX.cpp:176:26: warning: unused variable 'comp' [-Wunused-variable]
  compare_t_node_original comp;
                          ^~~~
g++ -g -Wall -O2 -o main HW5LINUX.o
finished

clean (3/3): 
finished

all task finished, build successfully