如何“释放/删除”？工作？
对于每个动态内存分配，使用“malloc/new”，我们有方法“free/delete”来释放分配的内存。
我的问题是，如果内存分配大小是在运行时决定的并且内存位置不连续，这些内存释放方法如何知道要释放多少内存以及要清除的内存位置是什么？
如果我们只向它们传递一个指向单个位置的指针，那么是什么让这些函数起作用？
Possible Duplicates:
How does delete work in C++?
C programming : How does free know how much to free?
For every dynamic memory allocation, using 'malloc / new', we have methods, 'free / delete' to free the allocated memory.
My question is if the memory allocation size is decieded at runtime and the memory locations not being contiguous, how does these memory freeing methods know how much memory to free and what are the memory locations to be cleared ?
What makes these functions work if we are passing them only a pointer to single location ?
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它们会跟踪您在内部分配了多少内存。
They keep track of how much memory you've allocated where internally.
当 malloc/new 分配内存时，它还会记录为指向给定内存位置的指针分配的内存位置和数量。当您给它一个指针时，
free/delete查找要释放的内存。这就是为什么你永远不应该尝试释放用“+=”或类似的东西移动的指针。
When
malloc/newallocates memory it also records where and how much memory it allocated for a pointer to a given memory location.free/deletelooks up what memory to deallocate when you give it a pointer.That is why you should never try to free a pointer that you moved with "+=" or something like that.