Parcurgerea matricei bidimensionale fara index C/C++

/*##########################################
## Program: Crearea, citirea si afisarea  ##
##          unei matrici doar cu pointeri ##
## Author: Curcudel Eugen (GuessGen)      ##
## WebSite: GuessGen.wordpress.com        ##
## Email: [email protected]         ##
##########################################*/

#include <stdio.h>
#include <stdlib.h>

int main()
{
    //alocarea memoriei (numarul de rinduri)
    int **mat = (int **)malloc(3*sizeof(int *));
    int **i, *j;

    //alocarea memoriei (numarul de elemente pe fiecare rind)
    for(i = mat; i < mat+3; i++)
        *i = (int *)malloc(3*sizeof(int));

    //parcurgerea si citirea matricei
    for(i = mat; i < mat+3; i++)
        for(j = *i; j < *i+3; j++)
            scanf("%d", j);

    //parcurgerea si afisarea matricei
    for(i = mat; i < mat+3; i++)
    {
        for(j = *i; j < *i+3; j++)
            printf("%3d", *j);
        printf("\n");
    }

    //eliberarea memoriei
    for(i = mat; i < mat+3; i++)
        free(*i);
    free(mat);

    return 0;
}