Where Does a Vector\'s Memory Reside: Stack or Heap?

Stack and Heap Memory Allocation for Vectors

When allocating vectors, the location of memory allocated depends on the following three cases:

1. vector vect;

In this case, the header information for the vector, including its capacity and size, is allocated on the stack. However, the actual elements of the vector, the Type values, are allocated on the free store, also known as the heap. This is because vectors are designed to manage large amounts of data, which may require dynamic allocation on the heap to accommodate variability in size.

2. vector *vect = new vector;

Unlike the previous case, when a vector is allocated using the new keyword, both the vector itself and its elements are allocated on the heap. The exception is the vector pointer vect, which still resides on the stack.

3. vector vect;

In this scenario, the vector is allocated on the stack, but the elements, which are pointers to Type values, are allocated on the heap. The location of the data pointed to by these pointers is determined by user manipulation.

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