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

Implement the c++ code in assembly language, Selecting Array Elements Imple...

Selecting Array Elements Implement the following C++ code in assembly language, using the block-structured .IF and .WHILE directives. Assume that all variables are 32-bit signed in

How many ways are there to initialize an int with a constant, There are two...

There are two ways for initializes in C++ as shown in the example that follows. The first way uses the traditional C notation. The second way uses constructor notation. int foo

Boardcoloring, how to fill the blank spaces in the board of 4*4 matrix with...

how to fill the blank spaces in the board of 4*4 matrix with the minimum of 4 colors and the condition is the adjacent element should not have the same colour

Luminous jewel - a polishing game, Byteland county is very famous for lumin...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Define commonly used built-in library functions, Define Commonly Used Built...

Define Commonly Used Built-in Library Functions? Comprise opened a file pointer you will desire to use it for either input or output. The C language supplies a set of functions

C , why c is middle level language?

why c is middle level language?

What are the precautions with function overloading, Precautions with functi...

Precautions with function overloading Function overloading is a boon to designers, since dissimilar names for same functions need not be thought of, which often is a cumbersome

Program to sort a range of numbers with insertion, Program to sort a range ...

Program to sort a range of numbers with Insertion: /* define variable */ const int max=29000; int list[max]; FILE *fp; clock_t start,end; char any1[8];

Write a program that finds the minimum total number of shelv, At a shop of ...

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

C program to add, C program to add, average and deviation of numbers: v...

C program to add, average and deviation of numbers: void main() {                 int sum=0,a[10],i;                 float avg=0,dev,vari=0,var;                 pri

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