Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:8:15: error: expected initializer before ‘.’ token ifstream f.("adunare.in") ^ user.cpp:10:10: error: ‘f’ was not declared in this scope f>>a;f>>b;g<<a+b; ^ user.cpp:10:13: error: ‘b’ was not declared in this scope f>>a;f>>b;g<<a+b; ^ user.cpp:10:15: error: ‘g’ was not declared in this scope f>>a;f>>b;g<<a+b; ^ user.cpp:10:18: error: ‘a’ was not declared in this scope f>>a;f>>b;g<<a+b; ^