C++ Assigning heap memory to each element(struct) in array of structs -

i confused allocating memory struct.

consider this.

struct {     .... }  a* array = new a[5];  // here trying assign memory array[0]  &(array[0]) = new a; << error

but give me error

lvalue required left operand of assignment`

i not sure on how assign memory struct a array[0].

thank in advance.

a type a* doesn't hold pointers should allocated individually new. a* contiguous block of memory holds 1 or more complete instances of a.

this means that

a* array = new a[3];

will allocate like

|   |   |   |

and each "cell" large sizeof(a) bytes. in case have 5 a instances, constructed.

if want have indipendent instances allocated on heap don't need a* a**.

a** array = new a*[3];

this creates contiguous array of 3 a* elements, pointers a sort of:

|  a*  |  a*  |  a*  |

ad each cell large sizeof(a*).

now can assign element of array specific instance of allocated on heap. eg:

array[0] = new a();

which yields like

|  a*  | ...    |    |    --> |   |

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