NSArray for boolean array, define size...

Hi!

Here is some code...
------------------------------------------------
#import <Foundation/NSObject.h>

@interface Building: NSObject {
int width;
int height;
bool *roomSeen;
}

-(Building *) initWithWidth:(int) w height:(int) h;

@end
------------------------------------------------

------------------------------------------------
#import "Fraction.h"
#import <stdio.h>

@implementation Building
-(Building *) initWithWidth:(int) w height:(int) h
{
width = w;
height = h;
roomSeen = bool[width*height];
}
@end

------------------------------------------------


Can I do it with a NSArray?

I notice initWithObjects: count: but how can I define an array of X objects if I don't already have the objects?

Thanks!

Fred

Hi!

This kinda help me... My problem is that I need to creates an array of boolean value of a specific size depending on the argument passed on the init method.

This array will be used by my class to monitor room seen by the user, since the number of room depend on the width and height of the building this array needs to be declare with a specific size.

This is an example made in C#, Can somebody put a equivalent in Objective-C?

------------------------------------------------
public class Building
{
private int width;
private int height;
private bool roomSeen[];

public Building (int width, int height)
{
this.width = width;
this.height = height;
this.roomSeen = new bool[width*height];

}
}
------------------------------------------------

Thanks!

Fred

Hi!

My code was full of error...

Look now I've even put comments...

------------------------------------
public class Building
{
//private variable int for the width (instance var)
private int width;
//private variable int for the height (instance var)
private int height;
//private variable array of bool for roomSeen (instance var)
private bool[] roomSeen;

//Class constructor
public Building (int width, int height)
{
//Send parameter width to private variable width
this.width = width;
//Send parameter height to private variable height
this.height = height;
//Create a new array of bool of the size of width*height
this.roomSeen = new bool[[width*height]];

}
}
----------------------------------

I know this class isn't usefull at all but I need to understand how to create my class in Objective-C...

Hi all!

I think I've something here but maybe I'm wrong...

I've looked at NSMutubleArray...

you can initWithCapacity, what I did without errors...

But when I try to use insertObject: atIndex: or replaceObjectAtIndex: withObject:

I got an error in the bottom of my screen "GDB: Program received signal: "EXC BADACCESS"" which I suppose is because I try to change an object with an index outside of the bounds since the capacity doesn't limit the NSMutableArray capacity...

Now I thing about the lamest way I think to do that would be to:
-write a little function that get an integer size as argument and return a NSArray
-when the function is called I create a new NSMutableArray, I do a For with the specified size and add a new NSNumber set to 0 to return an NSArray made from the NSMutableArray...

Maybe I'm missing some way to do a thing...

How would you do it?

Fred

Hi!

I think I understand something here..

In C, I cannot put an unsized array in the .H file and set the size in the init method in the .m file...

What I can do is....

Define a pointer and a size in the .h file...
Create an array of the good size in the .m file and put the memory address of the array in the pointer and use this array with the pointer and the size value...

What's my problem after this is how do I tell the object to not used the memory of this array after the method is finished?

-------------------------------------------

#import <Foundation/NSObject.h>

@interface Building: NSObject {
int width;
int height;
int *arrayPtr;
int arraySize;
}

-(Building *) initWithWidth:(int) w height:(int) h;

@end
-------------------------------------------
-------------------------------------------
#import "Fraction.h"
#import <stdio.h>

@implementation Building
-(Building *) initWithWidth:(int) w height:(int) h
{
width = w;
height = h;
arraySize = width * height;
int roomArray [[arraySize]];
arrayPtr = &roomArray;

}
@end
-------------------------------------------

Is that the way I should do it and how to keep the roomArray memory?

Thanks!

Fred

Hi Steve!

Thank you so much, I really now undertand how it works, I will now check how to execute a method to use the free() command when the object using my object release it...

But a huge thanks again to you for understanding what I wanted and guide me to the way of doing it..

Kudos to you!

Fred

Fred