/in/foo.c:1:2: error: invalid preprocessing directive #intclude
 #intclude<iostream>
  ^~~~~~~~
/in/foo.c:2:1: error: unknown type name 'using'
 using namespace std
 ^~~~~
/in/foo.c:2:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
 using namespace std
                 ^~~