August 2021
Intermediate to advanced
450 pages
9h 36m
Chinese
Content preview from C++程序设计：原理与实践（基础篇）（原书第2版）
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14.5.1 潜在的资源管理问题
我们必须小心处理表面上无害的指针赋值操作，如
原因是，在代码中保证每一个new操作都对应一个delete操作实际上是很困难的。至少在suspicious（）函数中，必须存在delete[]p这样的语句；这样的语句可能会释放内存资源，但也会存在某些意外使得内存的释放不会发生。我们在...中放入什么代码才能造成内存泄漏呢？我们的例子应该能为你带来一些启示并引起你对此类代码的警惕，也应令你更欣赏那些简单有力的替代程序。
当程序运行到delete语句时，p可能已不再指向我们所分配的内存资源：
上述例子中的if（x）使得我们不能够确定p的取值是否已经改变。程序也可能永远都不能到达delete语句：
程序不能到达delete语句的原因也许是程序抛出了一个异常：
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.