分配向量时,它们使用堆上的内存还是堆栈上的内存?
以下所有说法都是正确的吗?
Are all of the following statements true?
vector<Type> vect; //allocates vect on stack and each of the Type (using std::allocator) also will be on the stack
vector<Type> *vect = new vector<Type>; //allocates vect on heap and each of the Type will be allocated on stack
vector<Type*> vect; //vect will be on stack and Type* will be on heap.
如何在 vector
或任何其他 STL 容器中为 Type
内部分配内存?
How is the memory allocated internally for Type
in a vector
or any other STL container?
推荐答案
vector<Type> vect;
将在堆栈上分配vector
,即头信息,但在空闲存储(堆")上分配元素.
will allocate the vector
, i.e. the header info, on the stack, but the elements on the free store ("heap").
vector<Type> *vect = new vector<Type>;
分配免费商店中的所有内容.
allocates everything on the free store.
vector<Type*> vect;
将在堆栈上分配 vector
并在空闲存储上分配一堆指针,但是这些点的位置取决于您如何使用它们(您可以将元素 0 指向空闲存储和元素1 到堆栈,比如说).
will allocate the vector
on the stack and a bunch of pointers on the free store, but where these point is determined by how you use them (you could point element 0 to the free store and element 1 to the stack, say).
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