Solved

Array of function pointers

Posted on 1998-05-18
4
205 Views
Last Modified: 2013-12-26
Is it possible to create an array of function pointers and if so how ?
0
Comment
Question by:ShriramS
  • 2
  • 2
4 Comments
 
LVL 3

Accepted Solution

by:
msmits earned 20 total points
ID: 1299676
It should not be necessary in C++ and object-oriented programming to use arrats of function pointer, but technically it is possible.

void (*pfa[10])(char*);

Which is an array of 10 pointers to functions that return void and take a char* as parameter.

void xyz(char *x)
{
}

pfa[0] = xyz;

0
 
LVL 1

Author Comment

by:ShriramS
ID: 1299677
What I need to do is have a array of pointers in a class without knowing how many items I need in the array. How do I deal with that ? Can I declare a pointer in the declaration and then define it as an array in the constructor for example ?
0
 
LVL 3

Expert Comment

by:msmits
ID: 1299678
That depends on when you know how may pointer you need. If you know it at constructor time, you can create a pointer to an array of pointers and allocate the memory at constructor time for just the number of elements you need.

void (**pfa)(char*);

void xyz(char *x)
{}

X:x(int n) {
  pfa = new (void (*[n])(char *));
  pfa[0] = xyz;
}

pfa[0]("hello");

If you want real dynamic array, you need to use the vector class from the Standard Library.

0
 
LVL 1

Author Comment

by:ShriramS
ID: 1299679
Thank You
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Most of the sites are being standardized with W3C Web Standards. W3C provides lot of web standard services to the web. They have the web specification, process and documentation for all the web standards. You can apply HTML, CSS and Accessibility st…
Preface This is the third article about the EE Collaborative Login Project. A Better Website Login System (http://www.experts-exchange.com/A_2902.html) introduces the Login System and shows how to implement a login page. The EE Collaborative Logi…
Viewers will learn about the different types of variables in Java and how to declare them. Decide the type of variable desired: Put the keyword corresponding to the type of variable in front of the variable name: Use the equal sign to assign a v…
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…

932 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now