Implement the necessary changes to addname and del name to delete items by marking deleted items as unused. How isolated is the rest of the program from this change?

Implement the necessary changes to addname and del name to delete items by marking deleted items as unused. How isolated is the rest of the program from this change?

Implement the necessary changes to addname and del name to delete items by marking deleted items as unused. How isolated is the rest of the program from this change?

Implement the necessary changes to addname and del name to delete items by marking deleted items as unused. How isolated is the rest of the program from this change?