Eroare de compilare in evaluator: user.cpp:5: error: 'double y0' redeclared as different kind of symbol /usr/include/bits/mathcalls.h:241: error: previous declaration of 'double y0(double)' user.cpp: In function 'int main()': user.cpp:13: error: invalid operands of types 'double ()(double)throw ()' and 'double' to binary 'operator+' user.cpp:14: error: invalid operands of types 'double ()(double)throw ()' and 'double' to binary 'operator/' user.cpp:16: error: invalid operands of types 'double' and 'double ()(double)throw ()' to binary 'operator-'