xmalloc_test1:
  Test xmalloc for memory allocation.

  Request 4000 bytes of memory using malloc:

  Request 4000 bytes of memory using malloc_or_exit:

  Request 4000 bytes of memory using ymalloc:

  Request 4000 bytes of memory using xmalloc:
  Must be used LITERALLY as 'xmalloc(nbytes)'
  no spaces, no changes whatsoever!

  Request 0 bytes of memory using xmalloc(nbytes):

xmalloc_test1:
  Normal end of execution.