/in/foo.cc:1:2: error: invalid preprocessing directive #includ
 #includ<bits/stdc++.h>
  ^~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:5:2: error: 'cin' was not declared in this scope
  cin>>a>>m>>b>>n;
  ^~~
/in/foo.cc:7:3: error: 'cout' was not declared in this scope
   cout<<"xiao gu shi hao ren";
   ^~~~
/in/foo.cc:9:3: error: 'cout' was not declared in this scope
   cout<<"xiao wang shi huai dan";
   ^~~~
/in/foo.cc:11:3: error: 'cout' was not declared in this scope
   cout<<"yi xiang tian kai";
   ^~~~