/in/foo.c: In function 'main':
/in/foo.c:14:6: error: 'i' undeclared (first use in this function)
  for(i=0;i<N;i++)
      ^
/in/foo.c:14:6: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:6:6: warning: unused variable 'sumBUD' [-Wunused-variable]
  int sumBUD,sumAll=0;
      ^~~~~~