Compilare: user.cpp: In function ‘void add(nod*&, char*, int)’: user.cpp:25:16: warning: NULL used in arithmetic [-Wpointer-arith] if(p[0] == NULL) ^ user.cpp: In function ‘void caut(nod*, char*)’: user.cpp:59:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < r->inf.size(); i++) ^ user.cpp:61:16: warning: NULL used in arithmetic [-Wpointer-arith] if(p[0] == NULL) ^ /tmp/cciw1cK4.o: In function `citire()': user.cpp:(.text+0x23d): warning: the `gets' function is dangerous and should not be used.