View Compilation Error

0_0_30484080_22759.cpp: In function 'int main()':
0_0_30484080_22759.cpp:6:2: error: 'cin' was not declared in this scope
  cin>>m;
  ^
0_0_30484080_22759.cpp:31:2: error: 'cout' was not declared in this scope
  cout<<fixed<<setprecision(2)<<sum/(m-2)<<endl;
  ^
0_0_30484080_22759.cpp:31:8: error: 'fixed' was not declared in this scope
  cout<<fixed<<setprecision(2)<<sum/(m-2)<<endl;
        ^
0_0_30484080_22759.cpp:31:29: error: 'setprecision' was not declared in this scope
  cout<<fixed<<setprecision(2)<<sum/(m-2)<<endl;
                             ^
0_0_30484080_22759.cpp:31:43: error: 'endl' was not declared in this scope
  cout<<fixed<<setprecision(2)<<sum/(m-2)<<endl;
                                           ^