View Compilation Error

0_0_30172729_15414.cpp: In function 'int main()':
0_0_30172729_15414.cpp:6:9: error: 'cin' was not declared in this scope
         cin>>t;
         ^
0_0_30172729_15414.cpp:39:9: error: 'cout' was not declared in this scope
         cout<<"Case "<<i<<": ";
         ^
0_0_30172729_15414.cpp:41:33: error: 'endl' was not declared in this scope
                    cout<<"Yes"<<endl;
                                 ^
0_0_30172729_15414.cpp:44:26: error: 'endl' was not declared in this scope
              cout<<"No"<<endl;
                          ^