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

Accessibility, What are the legal requirements with which websites must com...

What are the legal requirements with which websites must comply in order to meet the needs of persons with disabilities? Why is maximizing accessibility important to everyone?

Constructor: Copy, b) Why copy constructor accepts reference to an object a...

b) Why copy constructor accepts reference to an object and not the object itself? What happens if we do otherwise?

C program to count the words, C program to count the words: void CountW...

C program to count the words: void CountWords();          void main()          {             printf("\n\tcount the words and enter string\n\n\n");             Count

Structure of cpp program, Structure of C++ Program: Chronological orde...

Structure of C++ Program: Chronological order of C++ program. 1.   Class declaration 2.   Main function program 3.   Member functions definitions 4.   Include heade

#title. RETIRED ON SOCIAL SECURITY., IS IT POSSIBLE FOR YOU TO WRITE A PR...

IS IT POSSIBLE FOR YOU TO WRITE A PROGRAM FOR ME TO MEASURE EXISTING ANGLES AND DO IF AND THEN FROM THIS , AND TO PLACE FIXED ANGLES AT CERTAIN POSITION AS A ADD WITH DLL FOR CERTA

Car rental payment system, payment system, in c++ only..just use the printf...

payment system, in c++ only..just use the printf or scanf.please

Explain in brief about the one-definition rule, Explain one-definition rule...

Explain one-definition rule (ODR). According to one-definition rule, C++ constructs should be identically defined in each compilation unit they are used in. As per ODR, two

Padovan string , .write a program that counts the number of occurrences of ...

.write a program that counts the number of occurrences of the string in the n-th padovan string p(n)   program in java // aakash , suraj , prem sasi kumar kamaraj college

Program, Modify the FACTOR program in this chapter so that it repeatedly as...

Modify the FACTOR program in this chapter so that it repeatedly asks for a number and calculates its factorial, until the user enters 0, at which point it terminates. You can enclo

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