understanding_memory_location_notes.md

Static Object Creation:

When you write:

Test t;   // object created normally

• t is created in stack memory (temporary memory).
• It is automatically destroyed when the function (main() here) ends.
• This is called static allocation.

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Dynamically Creating an Object

When you write:

Test *ptr;
ptr = new Test;

• new Test creates an object in the heap memory (a large pool of memory managed at runtime).

• It returns the address of that object.

• That address is stored in the pointer ptr.

• Unlike stack objects, heap objects are not automatically destroyed when the function ends.

  • You have to delete them yourself:

    delete ptr;   // frees memory

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🔑 Key Differences

Static Object (normal)	Dynamic Object (new)
Created on stack	Created on heap
Lifetime: auto (destroyed when function ends)	Lifetime: manual (until delete)
Accessed directly (e.g., t.in())	Accessed through pointer (e.g., ptr->in())
Size fixed at compile time	Size decided at runtime

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✅ Example

Test t;          // static → stack memory
Test *p = new Test; // dynamic → heap memory

• t exists only while main() runs.
• p’s object exists on heap until you explicitly free it with delete p;.

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So, dynamically creating an object means: Making an object at runtime in the heap using new, instead of automatically on the stack.

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