View Compilation Error

0_0_13954374_24441.cpp: In member function 'void rational::print()':
0_0_13954374_24441.cpp:43:3: error: 'cout' was not declared in this scope
   cout << a;
   ^
0_0_13954374_24441.cpp:45:24: error: 'endl' was not declared in this scope
    cout << "/" << b << endl;
                        ^