Eroare de compilare: user.cpp:10:16: error: ‘char exp [100002]’ redeclared as different kind of symbol char exp[100002]; ^ In file included from /usr/include/features.h:357:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/os_defines.h:39, from /usr/include/i386-linux-gnu/c++/4.8/bits/c++config.h:420, from /usr/include/c++/4.8/iostream:38, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:101:1: error: previous declaration of ‘double exp(double)’ __MATHCALL (exp,, (_Mdouble_ __x)); ^ user.cpp: In function ‘int nextnr()’: user.cpp:40:13: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript if(exp[p]=='-') {semn=-1;p++;} ^ user.cpp:41:13: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript nr=exp[p]-'0'; ^ user.cpp:43:14: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript if((exp[p]>='0') && (exp[p]<='9')) {nr=nr*10+exp[p]-'0'; p++;} ^ user.cpp:43:31: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript if((exp[p]>='0') && (exp[p]<='9')) {nr=nr*10+exp[p]-'0'; p++;} ^ user.cpp:43:55: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript if((exp[p]>='0') && (exp[p]<='9')) {nr=nr*10+exp[p]-'0'; p++;} ^ user.cpp: In function ‘int main()’: user.cpp:50:6: error: no match for ‘operator>>’ (operand types are ‘std::ifstream {aka std::basic_ifstream<char>}’ and ‘<unresolved overloaded function type>’) f>>exp; ^ user.cpp:50:6: note: candidates are: In file included from /usr/include/c++/4.8/iostream:40:0, from user.cpp:1: /usr/include/c++/4.8/istream:120:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__istream_type& (*)(std::basic_istream<_CharT, _Traits>::__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] operator>>(__istream_type& (*__pf)(__istream_type&)) ^ /usr/include/c++/4.8/istream:120:7: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&) {aka std::basic_istream<char>& (*)(std::basic_istream<char>&)}’ /usr/include/c++/4.8/istream:124:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__ios_type& (*)(std::basic_istream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>; std::basic_istream<_CharT, _Traits>::__ios_type = std::basic_ios<char>] operator>>(__ios_type& (*__pf)(__ios_type&)) ^ /usr/include/c++/4.8/istream:124:7: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&) {aka std::basic_ios<char>& (*)(std::basic_ios<char>&)}’ /usr/include/c++/4.8/istream:131:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] operator>>(ios_base& (*__pf)(ios_base&)) ^ /usr/include/c++/4.8/istream:131:7: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::ios_base& (*)(std::ios_base&)’ /usr/include/c++/4.8/istream:168:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] operator>>(bool& __n) ^ /usr/include/c++/4.8/istream:168:7: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘bool&’