nebuni.cpp: In function 'NODE* addNode(NODE**, int)': nebuni.cpp:42: warning: no return statement in function returning non-void nebuni.cpp: In function 'NODE* removeNode(NODE**, NODE*)': nebuni.cpp:60: warning: no return statement in function returning non-void nebuni.cpp: In function 'int main()': nebuni.cpp:154: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result nebuni.cpp:155: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result nebuni.cpp:159: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result