Figure 1 represents the struct mystruct and its members in the heap segment.

图1表示堆分段中的struct mystruct及其成员。

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Figure 3 represents the struct mystruct and its members in the heap segment after the overflow.

图3表示溢出后的堆分段中的struct mystruct及其成员。

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Figure 2 represents the struct mystruct and its members in the heap segment after the overflow.

图 2 表示溢出后的堆分段中的 struct mystruct 及其成员。

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Now, as an aside, there's another couple of layers at the very top above the stack and above the heap, but below the tech segment and those are called initialized data and uninitialized data.

题外话，在堆和栈的顶端,还有好几层，但是在技术段之下,他们被叫做初始化数据和未初始化数据。

哈佛公开课 - 计算机科学课程节选