在VLisp编的程序中,如下例:
high_flag 是一个参数
(cond
((<= high_flag 40) (setq width 40))
((<= high_flag 60) (setq width 60))
((<= high_flag 100)(setq width 100))
);end cond
;-----------------------------------------------------------------------------------------
(if (<= high_flag 40)
(setq width 40)
)
(if (<= high_flag 60)
(setq width 60)
)
(if (<= high_flag 100)
(setq width 100)
)
是用cond编写的程序运行快还是用If一个一个的判断程序运行的快呢?????? |