View Compilation Error

0_0_34473921_24045.cpp: In function 'int main()':
0_0_34473921_24045.cpp:6:5: error: 'ios' has not been declared
     ios::sync_with_stdio(false);
     ^
0_0_34473921_24045.cpp:7:5: error: 'cin' was not declared in this scope
     cin.tie(0);cout.tie(0);
     ^
0_0_34473921_24045.cpp:7:16: error: 'cout' was not declared in this scope
     cin.tie(0);cout.tie(0);
                ^
0_0_34473921_24045.cpp:18:15: error: 'fixed' was not declared in this scope
         cout<<fixed<<setprecision(10)<<(-b-sqrt(b*b-4*a*c))/(a+a)<<endl;
               ^
0_0_34473921_24045.cpp:18:37: error: 'setprecision' was not declared in this scope
         cout<<fixed<<setprecision(10)<<(-b-sqrt(b*b-4*a*c))/(a+a)<<endl;
                                     ^
0_0_34473921_24045.cpp:18:58: error: 'sqrt' was not declared in this scope
         cout<<fixed<<setprecision(10)<<(-b-sqrt(b*b-4*a*c))/(a+a)<<endl;
                                                          ^
0_0_34473921_24045.cpp:18:68: error: 'endl' was not declared in this scope
         cout<<fixed<<setprecision(10)<<(-b-sqrt(b*b-4*a*c))/(a+a)<<endl;
                                                                    ^