Eroare de compilare: user.cpp:5: error: 'double y1' redeclared as different kind of symbol /usr/include/bits/mathcalls.h:242: error: previous declaration of 'double y1(double)' user.cpp: In function 'int main()': user.cpp:12: warning: format '%lf' expects type 'double*', but argument 3 has type 'int*' user.cpp:16: warning: format '%lf' expects type 'double*', but argument 4 has type 'double (*)(double)throw ()' user.cpp:18: error: invalid operands of types 'double' and 'double ()(double)throw ()' to binary 'operator-' user.cpp:18: error: invalid operands of types 'double' and 'double ()(double)throw ()' to binary 'operator-' user.cpp:21: error: invalid operands of types 'double ()(double)throw ()' and 'double' to binary 'operator=='