/in/foo.cc: In function 'int main()':
/in/foo.cc:9:2: error: expected initializer before 'int'
  int x;
  ^~~
/in/foo.cc:12:8: error: 'sb' was not declared in this scope
   cin>>sb[i];
        ^~
/in/foo.cc:14:7: error: 'x' was not declared in this scope
  cin>>x;
       ^
/in/foo.cc:15:8: error: 'sb' was not declared in this scope
  cout<<sb[x];
        ^~