View Compilation Error

0_0_17038103_30853.cpp: In function 'int main()':
0_0_17038103_30853.cpp:27:5: error: 'cin' was not declared in this scope
     cin>>T;
     ^
0_0_17038103_30853.cpp:32:9: error: 'cout' was not declared in this scope
         cout<<m[n]<<endl;
         ^
0_0_17038103_30853.cpp:32:21: error: 'endl' was not declared in this scope
         cout<<m[n]<<endl;
                     ^