August 2021
Intermediate to advanced
450 pages
5h 35m
Chinese
Content preview from C++语言导学（原书第2版）
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15.4 返回结果
在15.3节的例子中，我通过一个非const引用向线程传递参数。只有在我希望任务修改引用所指向的数据时，我才会这么做（参见1.7节）。这种返回结果的方法有点儿不正规，但并不罕见。一种不那么晦涩的技术是将输入数据以const引用的方式传递，并将保存结果的内存地址作为第二个参数传递给线程。
这种技术很有效也很常见，但我不认为通过引用返回结果是一种很优雅的方法，因此我将在15.7.1节再次讨论这个问题。
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