View Compilation Error

0_0_24910388_21745.cpp: In function 'int main()':
0_0_24910388_21745.cpp:21:9: error: 'cin' was not declared in this scope
         cin >> m >> n;  
         ^
0_0_24910388_21745.cpp:25:9: error: 'cout' was not declared in this scope
         cout << "Test #" << ++num << ":" << endl;  
         ^
0_0_24910388_21745.cpp:25:45: error: 'endl' was not declared in this scope
         cout << "Test #" << ++num << ":" << endl;  
                                             ^