/in/foo.cc:1:1: error: 'include' does not name a type
 include<stdio.h>
 ^
/in/foo.cc: In function 'int gjc(int)':
/in/foo.cc:6:12: error: 'top' was not declared in this scope
 for(i=1;i<=top;i++)
            ^
/in/foo.cc:8:2: error: 'a' was not declared in this scope
  a[i]*=x;
  ^