Solved

can I initialize member like this?

Posted on 1997-11-12
5
267 Views
Last Modified: 2010-04-10
here is what I did:

class Date {
  private:
    int day;     // Stores the day, 1-31.
    int month; // Stores the month, 1 -12.
    int year;  // Stores the year.  Any by size of int.

    // List of months for converting to a value.
    char months[] = 3D { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
                        "Sep", "Oct", "Nov", "Dec"};
  public:
    Date();
    Date(char *d);
    //{  // Constructor with the string for part 2.
    //  setDate(d);
    //}
    void setDate(const char *d);
    char *getDate() const;class Date {
  private:
    int day;     // Stores the day, 1-31.
    int month; // Stores the month, 1 -12.
    int year;  // Stores the year.  Any by size of int.

    // List of months for converting to a value.
    char months[] = 3D { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
                        "Sep", "Oct", "Nov", "Dec"};
  public:
    Date(char *d);
    {  // Constructor with the string for part 2.
      setDate(d);
    }
    void setDate(const char *d);
    char *getDate() const;
...
};

I got an error msg: Can't initialize a member here.
on the line of char months[] = 3D {...};

why?

Thank you
0
Comment
Question by:calprcr
  • 3
5 Comments
 
LVL 1

Accepted Solution

by:
Hardaway earned 0 total points
ID: 1173036
What do you mean by 3D??

I think the correct way is like the following :
char months[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};

"Jan" is a string rather than a character.
4 instead of 3 because of a string separator.
0
 

Author Comment

by:calprcr
ID: 1173037
I got rid of 3D and do what you gave me. I still got the error msg.


0
 
LVL 22

Expert Comment

by:nietod
ID: 1173038
Hardaway's answer is syntaclly right to initialize an array.  But you can't initialize an array that is a class/structure member.  (or you can, but you must do it in the constructor.)

0
 
LVL 22

Expert Comment

by:nietod
ID: 1173039
Actually, I think the "real" problem is that you don't want the array to be a member, or if you do, you want it to be a static member.  The way it is not, as a non-static member, each data object will have its own (private, seperate) copy of the months array.  That is probably a waste.  You can either declare it global or static.  (Static will produce one copy that is shared among all the date objects).
0
 
LVL 22

Expert Comment

by:nietod
ID: 1173040
Also multi-dimentional arrays in C++ are kinda weak.  I avoid them if I can.  For this kind of table, an array of character pointers usually works best.  Like

const char *Months = {"Jan","Feb",Mar"};

one advantage of this is that the strings can be different lengths, like

const char *Months = {"January","February",March"};

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

Templates For Beginners Or How To Encourage The Compiler To Work For You Introduction This tutorial is targeted at the reader who is, perhaps, familiar with the basics of C++ but would prefer a little slower introduction to the more ad…
This article will show you some of the more useful Standard Template Library (STL) algorithms through the use of working examples.  You will learn about how these algorithms fit into the STL architecture, how they work with STL containers, and why t…
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

910 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

23 Experts available now in Live!

Get 1:1 Help Now