########### CODE SOURCE avec COMMENTAIRES DE DEBUG #####################

    main()
    {
       SqrMatrix m1(3,3);

*** debug : Matrix (3,3) constructed ; instances: 1
 --- MemBlk debug : constructed [36]
 --- MemBlk debug : allocated, refs = 1, blocks: 1

       cout << m1 << endl;

1	2	3
4	5	6
7	8	0

       SqrMatrix m2 = m1;

*** debug : Matrix (3,3) constructed ; instances: 2
 --- MemBlk debug : copy-constructed, refs = 2

       SqrMatrix m3 = m2;

*** debug : Matrix (3,3) constructed ; instances: 3
 --- MemBlk debug : copy-constructed, refs = 3

       SqrMatrix m4 = m3;

*** debug : Matrix (3,3) constructed ; instances: 4
 --- MemBlk debug : copy-constructed, refs = 4

       return 0;
    }

 --- MemBlk debug : freed, refs = 3
 --- MemBlk debug : destroyed [36]
*** debug : Matrix (3,3) deleted ; instances: 3

 --- MemBlk debug : freed, refs = 2
 --- MemBlk debug : destroyed [36]
*** debug : Matrix (3,3) deleted ; instances: 2

 --- MemBlk debug : freed, refs = 1
 --- MemBlk debug : destroyed [36]
*** debug : Matrix (3,3) deleted ; instances: 1

 --- MemBlk debug : freed, blocks: 0
 --- MemBlk debug : destroyed [36]
*** debug : Matrix (3,3) deleted ; instances: 0