Compilare: user.cpp: In constructor ‘Trie::Trie()’: user.cpp:15:42: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(Litere,NULL,sizeof(Litere)); ^ user.cpp: In function ‘void Add_In_Trie(Trie*, char*)’: user.cpp:23:12: warning: NULL used in arithmetic [-Wpointer-arith] if(*s==NULL){ ^ user.cpp: In function ‘int GetPref(Trie*, char*, int)’: user.cpp:36:13: warning: NULL used in arithmetic [-Wpointer-arith] if( *s==NULL || nod->Litere[*s-'a']==NULL)return dim; ^ user.cpp: In function ‘int Nrcuv(Trie*, char*)’: user.cpp:42:12: warning: NULL used in arithmetic [-Wpointer-arith] if(*s==NULL){ ^ user.cpp: In function ‘bool DeleteWord(Trie*, char*)’: user.cpp:51:12: warning: NULL used in arithmetic [-Wpointer-arith] if(*s==NULL)--nod->nrWord; ^ user.cpp: In function ‘void ReadData()’: user.cpp:78:21: warning: unused variable ‘a’ [-Wunused-variable] int a=DeleteWord(Rad,x+2); ^