thanks again for your patience, now i'm trying to do it like you suggested...
i've declared data like a pointer to my value type (valuet *data), then in constructor when i do:
data = new valuet[row][col];
i get this error:
error: 'col' cannot appear in a constant-expression
it doesn't allow me to create a bidimensional array but just a normal array...
Stefano112
Last Activity: Feb 22 '10, 04:03 PM
Joined: Jan 29 '10
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well but as also Banfa said the data in my matrix are not contiguos, so if i have
1 2 3
4 5 6
7 8 9
element 5 will not be the address of element 0 + 4 x sizeof(the element)...if i add sizeof(element) to element 3, i will get a value that is not in the first row, and is not in the second row, it's just between the two rows!
So as Banfa said i have to make my operator++ of the iterator more complicated, i've done...Leave a comment:
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but my array is bidimensional (**_data), so when i have:
1 2 3
4 5 6
7 8 9
there are same values between the rows (like a 0 and a 33...but i think they can change :P)
so how can i move from a row to an another without incrementing both *ptr and ptr?
thanks for your answer weaknessforcats , i have to finish this project in a few days but i can't fix this last problem :/ i hope someone can help me!Leave a comment:
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WARNING:i know it's a long post (cause there is a lot of code), but i m asking just for a little problem, please try to help me even if it's long cause i really need your help!
ok now i fixed the main problem, now when i try to read or to set all the elements of the matrix it works, but i have another little problem, first of all, here is my class iterator (nested inside class matrice (matrix in italian :P), and the two functions...Leave a comment:
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thanks a lot for your answer, unfortunately i cannot use the second option cause the teacher asked us to not implement the matrix in that way
I have already tried the first option, but i wasn't able to make it works...cause i would need to compare my pointer with _data[row][_col-1], then if they are the same skip to _data[row+1][0], else i would just increment my pointer
The problem is that i dont understand how can i make _data of...Leave a comment:
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How to make an iterator for my Matrix class
Hi, i'm making a matrix class, here is my code:
...Code:#ifndef MATRICE_H #define MATRICE_H #include <iostream> template <class T> class matrice { public: typedef int sizet; typedef T valuet; matrice(): _data(0), _row(0), _col(0) {}; //costruttore default matrice(sizet rw, sizet cl) { //causa errore in valgrind
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