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简单的表达:
variable x ok 4 x ! ok 3 x < . -1 ok 3 x > . 0 ok
然而,这似乎是正常和正确的:
variable x ok 3 x ! ok x 4 < . 0 ok x 4 > . -1 ok
第二个代码块是错误的。什么是错误的评估?这里有什么问题?
variable x创建一个新变量,但x返回地址,而不是值。
variable x
x
你需要这样的东西:
variable x 3 x ! ok x @ 4 < . x @ 4 > .