/in/foo.cc: In function 'int un(int*, int, int*)':
/in/foo.cc:15:6: warning: unused variable 'i' [-Wunused-variable]
  int i=0,k=0;
      ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:36:22: warning: 'memset' used with constant zero length parameter; this could be due to transposed parameters [-Wmemset-transposed-args]
  memset(h,sizeof(b),0);
                      ^