Eroare de compilare: main.cpp:22:5: error: 'int index' redeclared as different kind of symbol int index; ^~~~~ In file included from /usr/include/c++/6/cstring:42:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:48, from main.cpp:1: /usr/include/string.h:477:1: note: previous declaration 'const char* index(const char*, int)' index (const char *__s, int __c) __THROW ^~~~~ main.cpp: In function 'void Insert(Trie*, char*)': main.cpp:27:16: warning: NULL used in arithmetic [-Wpointer-arith] if ( *s == NULL ) ^~~~ Non zero exit status: 1