Eroare de compilare: user.cpp:8:8: error: ‘std::string exp’ redeclared as different kind of symbol string exp; ^ 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/iosfwd:38, from /usr/include/c++/4.8/ios:38, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream: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 main()’: user.cpp:27:9: error: overloaded function with no contextual type information exp = a; ^ user.cpp:28:13: error: ‘std::exp’ does not have class type it = exp.begin(); ^ user.cpp:38:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < pos.size(); ++j) ^ user.cpp:46:11: error: overloaded function with no contextual type information exp = a; ^ user.cpp:47:15: error: ‘std::exp’ does not have class type it = exp.begin(); ^ user.cpp:52:11: error: overloaded function with no contextual type information exp = b; ^ user.cpp:53:15: error: ‘std::exp’ does not have class type it = exp.begin(); ^ user.cpp: In function ‘bool oring()’: user.cpp:78:18: error: ‘std::exp’ does not have class type while(it != exp.end() && *it == '|'){ ^ user.cpp: In function ‘bool xoring()’: user.cpp:87:18: error: ‘std::exp’ does not have class type while(it != exp.end() && *it == '^'){ ^ user.cpp: In function ‘bool anding()’: user.cpp:96:18: error: ‘std::exp’ does not have class type while(it != exp.end() && *it == '&'){ ^