Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:17:21: error: expected ‘)’ before ‘;’ token else (d=b*b-4*a*c; ^ user.cpp: At global scope: user.cpp:24:1: error: ‘g’ does not name a type g.close();return 0; ^ user.cpp:24:11: error: expected unqualified-id before ‘return’ g.close();return 0; ^ user.cpp:25:1: error: expected declaration before ‘}’ token } ^