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

Super ASCII String Cost, A string S is said to be "Super ASCII", if it cont...

A string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''a''-''z'') and the asci

Explain the changing field width, Changing Field width The printf() and...

Changing Field width The printf() and scanf() functions from the standard library, use width specifier for controlling the width of its output . Similarly, the ostream class al

Can i explicitly call a destructor if i''ve allocated my , Can I explicitly...

Can I explicitly call a destructor if I've allocated my object with new?

Statistical and Numerical methods using C++–, An experiment succeeds twice ...

An experiment succeeds twice as often as it fails. Find the chance that in the next six trials there will be at least four successes.

C program to add two complex numbers , Aim: To implement a program to add ...

Aim: To implement a program to add two complex numbers using constructors. Code:                       class complex {             int real;             int img;

Static data meber and const data meber, can we use const data member in sta...

can we use const data member in static. member function with example.

Minimum Shelf , At a shop of marbles, packs of marbles are prepared. Packet...

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

C language, There is a pebble merchant. He sells the pebbles, that are used...

There is a pebble merchant. He sells the pebbles, that are used for shining the floor. His main duty is to take the length of the room’s sides. But he sometimes mistakes doing that

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