After p = new fred[n], how does the compiler know about , C/C++ Programming

Assignment Help:

After p = new Fred[n], how does the compiler know about n objects to be destructed throughout delete[] p?

A:  The run-time system hold the number of objects, n, somewhere where it may be retrieved if you know the pointer, p only. There are two famous techniques that do this. Both of these technique are in use trhough commercial-grade compilers, both have tradeoffs, & neither is perfect. These techniques are following:

Over-allocate the array & put n only to the left of the first Fred object. Employ an associative array along with p as the key and n as the value.

 


Related Discussions:- After p = new fred[n], how does the compiler know about

When should i use references, A: Use references when you can use, and use p...

A: Use references when you can use, and use pointers when you have to. References are generally preferred over pointers whenever you don't require "reseating". Usually this mean

multithreaded server, Implement a multithreaded server that can be used as...

Implement a multithreaded server that can be used as a proxy server to access some designated file (say it reflects the proxy copy of two file1.txt, file2.txt). Now use a client to

Eevrv, Ask question #Mi fd d fffffffffffffffffffffffffffffffffffffffffff...

Ask question #Mi fd d fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff

Minimum shelf, At a shop of marbles, packs of marbles are prepared. Packets...

At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers of packets with thes

Structures, A more advanced data type is the structure; here we can define ...

A more advanced data type is the structure; here we can define a template as a collection of different variables e.g.     struct birthdate   {     int month;     int day;

Algorithm, make a marksheet of 2 student with 5 subject

make a marksheet of 2 student with 5 subject

Palindrome, string S convert it to a palindrome by doing chara, C/C++ Progr...

string S convert it to a palindrome by doing chara, C/C++ Programming

Saha, find the minimum total number of shelves

find the minimum total number of shelves

Implement a binomial tree class, a) Implement a binomial tree class with a ...

a) Implement a binomial tree class with a method that calculates the value of an option passed in to the class. The binomial tree should not rely on specific features of the differ

Maze, How would I make a maze in C++? I would prefer to use the recursion m...

How would I make a maze in C++? I would prefer to use the recursion maze generation algorithm if possible, thanks!

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd