View Compilation Error

0_0_35308169_32588.cpp: In function 'int main()':
0_0_35308169_32588.cpp:8:5: error: 'cin' was not declared in this scope
     cin>>n;
     ^
0_0_35308169_32588.cpp:11:9: error: 'string' was not declared in this scope
         string s;
         ^
0_0_35308169_32588.cpp:12:17: error: 's' was not declared in this scope
         cin>>m>>s;
                 ^
0_0_35308169_32588.cpp:15:13: error: 'cout' was not declared in this scope
             cout<<"Case #"<<i<<": 0.00%"<<endl;
             ^
0_0_35308169_32588.cpp:15:43: error: 'endl' was not declared in this scope
             cout<<"Case #"<<i<<": 0.00%"<<endl;
                                           ^
0_0_35308169_32588.cpp:28:17: error: 'cout' was not declared in this scope
                 cout<<"Case #"<<i<<": ";
                 ^
0_0_35308169_32588.cpp:29:35: error: 'printf' was not declared in this scope
                 printf("%.2lf",ans);
                                   ^
0_0_35308169_32588.cpp:30:28: error: 'endl' was not declared in this scope
                 cout<<"%"<<endl;
                            ^