Eroare de compilare: user.cpp:10:5: error: ‘int index’ redeclared as different kind of symbol int index=0; ^ In file included from /usr/include/c++/4.8/cstring:42:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:48, from user.cpp:1: /usr/include/string.h:482:1: error: previous declaration of ‘const char* index(const char*, int)’ index (__const char *__s, int __c) __THROW ^ user.cpp: In function ‘void DFS(int)’: user.cpp:34:23: error: no pre-increment operator for type first_occurence[++index] = node; ^ user.cpp:44:26: error: cannot resolve overloaded function ‘index’ based on conversion to type ‘int’ last_occurence[node] = index; ^