"The Canterbury Tales" by Chaucer, G.
"Algorithms" by Sedgewick, R.
"The C Programming Language" by Kernighan, B. and Ritchie, D.
END
BORROW "Algorithms"
BORROW "The C Programming Language"
SHELVE
RETURN "Algorithms"
SHELVE
BORROW "The Canterbury Tales"
RETURN "The C Programming Language"
SHELVE
RETURN "The Canterbury Tales"
SHELVE



应该输出

END
Put "Algorithms" after "The Canterbury Tales"
END
Put "The C Programming Language" first
END
Put "The Canterbury Tales" first
END


有可能是还掉的书没清空。.反正我就是这样挂的- -