Eroare de compilare: user.cpp:9:14: error: ‘char rand [155]’ redeclared as different kind of symbol char rand[155]; ^ In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/c++/4.8/ext/string_conversions.h:41, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/stdlib.h:380:12: error: previous declaration of ‘int rand()’ extern int rand (void) __THROW; ^ user.cpp: In function ‘int main()’: user.cpp:17:24: warning: pointer to a function used in arithmetic [-Wpointer-arith] f.getline(rand+1, m+1); ^ user.cpp:17:30: error: no matching function for call to ‘std::basic_ifstream<char>::getline(int (*)()throw (), int)’ f.getline(rand+1, m+1); ^ user.cpp:17:30: note: candidates are: In file included from /usr/include/c++/4.8/fstream:38:0, from user.cpp:1: /usr/include/c++/4.8/istream:618:5: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(std::basic_istream<_CharT, _Traits>::char_type*, std::streamsize, std::basic_istream<_CharT, _Traits>::char_type) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::char_type = char; std::streamsize = int] basic_istream<char>:: ^ /usr/include/c++/4.8/istream:618:5: note: candidate expects 3 arguments, 2 provided /usr/include/c++/4.8/istream:427:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::getline(std::basic_istream<_CharT, _Traits>::char_type*, std::streamsize) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>; std::basic_istream<_CharT, _Traits>::char_type = char; std::streamsize = int] getline(char_type* __s, streamsize __n) ^ /usr/include/c++/4.8/istream:427:7: note: no known conversion for argument 1 from ‘int (*)()throw ()’ to ‘std::basic_istream<char>::char_type* {aka char*}’ user.cpp:19:32: warning: pointer to a function used in arithmetic [-Wpointer-arith] mat[i][j] = (rand[j] == '0' ? 1 : 0); ^ user.cpp:19:37: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] mat[i][j] = (rand[j] == '0' ? 1 : 0); ^