memory allocation in C

[eugensth]

Hi,

I have a problem with memory allocation in C. After allocating with malloc a matrix of integers :

int*a = malloc(10 * sizeof (int));

I would like to free the memory occupated by some values like a[3], or a[5], but keeping the other elements of the matrix and the matrix itself.
Can anybody help me?

Thanks anticipated

 

[TheHeadFL]

The only way to do this that I would reccomend, would be creating a dynamically resizable array.

Start with 10, if you like. As you delete one, create a new array of 9. Copy all remaining elements to that one, and free() the original array of 10.

 

[eugensth]

But what happens when I deal with big matrixes of structures ? I guess this will consume a lot of resources, ain't?

 

[TheHeadFL]

This is how its always been done if you want to use simple arrays and matrices.

Unless you would like to use a linked list instead....

 

[eugensth]

That's what I wanted to avoid, but I see I have no other choice.