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已知汽油的热值为 J/kg。1kg的汽油燃烧一半后,剩下汽油的热值为( )
std::out_of_range表示你正在访问vector中不存在的值。在这种情况下,它是你试图访问的第一个值c[0],但失败了。这意味着vector c是空的。如果你能提供一个具体的例子,说明类在抛出时是如何使用的,那么我们也许能告诉你为什么。
This is a problem listed at the end of a book I've been reading and this one really stumped me: In some circumstances when implementing recursive operations on linked lists, the parameter to the recursive method is declared using a syntax similar to someOper(ListNode * & listPtr). What's...