Because the condition lamp1 lamp3 returned -1, the statement lamp1 < lamp3 returns true.

因为条件lamp1lamp3返回-1，所以语句 lamp1 < lamp3返回true。

youdao

Because the condition lamp1 lamp3 returned -1, the statement lamp1 < lamp3 returns true.

因为条件lamp1lamp3返回-1，所以语句 lamp1 < lamp3返回true。

youdao