Eroare de compilare: user.cpp:13:5: error: ‘int free’ redeclared as different kind of symbol int free; ^~~~ In file included from /usr/include/c++/6/cstdlib:75:0, from /usr/include/c++/6/ext/string_conversions.h:41, from /usr/include/c++/6/bits/basic_string.h:5417, from /usr/include/c++/6/string:52, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from user.cpp:1: /usr/include/stdlib.h:483:13: note: previous declaration ‘void free(void*)’ extern void free (void *__ptr) __THROW; ^~~~ user.cpp: In function ‘void filll(int, int)’: user.cpp:56:17: warning: ISO C++ forbids incrementing a pointer of type ‘void (*)(void*) throw ()’ [-Wpointer-arith] free++; ^~ user.cpp:56:17: error: lvalue required as increment operand user.cpp: In function ‘void solve()’: user.cpp:74:22: error: assignment of function ‘void free(void*)’ free=0;cnt=0; ^ user.cpp:74:22: error: cannot convert ‘int’ to ‘void(void*) throw ()’ in assignment user.cpp:77:28: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if(free == 1) ^