Compilare: user.cpp: In function ‘std::pair<T*, T*> split(T*, int)’: user.cpp:84:23: warning: control reaches end of non-void function [-Wreturn-type] return tmp; } } ^ user.cpp: In function ‘T* kth(T*, int)’: user.cpp:90:54: warning: control reaches end of non-void function [-Wreturn-type] if(nod->st->siz > pos) return kth(nod->st, pos); } ^ user.cpp: In function ‘int main()’: user.cpp:116:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rev.in", "r", stdin); fin = stdin; ^ user.cpp:117:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rev.out", "w", stdout); ^ user.cpp: In function ‘void next_char()’: user.cpp:15:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, BUFF_SIZE, fin); ^