As a general rule, anywhere constants are in use, such as in places you are currently using the switch code to switch constants.

一条普遍规则是，任何使用常量的地方，例如目前用switch代码切换常量的地方。

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A pre-set code is given to the farmer to switch on or off the pumpset.

一个预设代码给农夫打开或关闭泵唧装置。

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The last line shown demonstrates how this is used as a switch throughout the code.

上述代码最后一行展示如何将这个常量用作整个代码中的一个开关。

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Hape moved to The Rec in a cross-code switch from Bradford Bulls in 2008.

BBC: London Irish sign Bath & England centre Shontayne Hape

Vainikolo's selection continues his explosive impact on the 15-man game following his cross-code switch from the Bradford Bulls to Gloucester in the summer.

BBC: Vainikolo named in England squad

But the cross-code switch has not worked out so well for other young players, with the likes of Chev Walker and Karl Pryce both returning to their original sport after unhappy spells in union.

BBC: Newcastle snap up Rhino Williams