#include <stdio.h>
#include <assert.h>

#define MAX_NELEM 3

int main(void)
    {
        int i=0;
        int myarray[MAX_NELEM][MAX_NELEM];

        myarray[0][0]=1;
        myarray[0][1]=2;
        myarray[0][2]=3;
        myarray[1][0]=4;
        myarray[1][1]=5;
        myarray[1][2]=6;
        myarray[2][0]=7;
        myarray[2][1]=8;
        myarray[2][2]=9;

        printf("myarray[0,0] =%d\n",  myarray[0][0]);
        printf("myarray[0,1] =%d\n",  myarray[0][1]);
        printf("myarray[0,2] =%d\n",  myarray[0][2]);
        printf("myarray[1,0] =%d\n",  myarray[1][0]);
        printf("myarray[11,1] =%d\n", myarray[1][1]);
        printf("myarray[1,2] =%d\n",  myarray[1][2]);

         
// this is how to dynamically allocate memory ...
        int **myArray1;
        int m=MAX_NELEM;
        int n=MAX_NELEM;
        myArray1 = (int **) malloc(m*sizeof(int *));
        for (i=0;i<m;i++)
        myArray1[i] = (int *) malloc(n*sizeof(int));
        for (i=0; i<MAX_NELEM;i++)
        {
        *(myArray1[0]+i)=i+0;
        *(myArray1[1]+i)=i+10;
        *(myArray1[2]+i)=i+20;
        }

        printf("myArray1[0,0] =%d\n",  myArray1[0][0]);
        printf("myArray1[0,1] =%d\n",  myArray1[0][1]);
        printf("myArray1[0,2] =%d\n",  myArray1[0][2]);
        printf("myArray1[1,0] =%d\n",  myArray1[1][0]);
        printf("myArray1[1,1] =%d\n", myArray1[1][1]);
        printf("myArray1[1,2] =%d\n",  myArray1[1][2]);

        int *ptr;
        ptr=&myarray[0][0];
        //for (i=0; i<MAX_NELEM*MAX_NELEM;i++)
        //*(ptr+i)=i+10;
        for (i=0; i<MAX_NELEM*MAX_NELEM;i++)
        {
        printf("myarray[%d] =%d\n", i, *ptr);
        ptr++;
        }

        int *ptr1;
        ptr1=&myArray1[0][0];
        for (i=0; i<MAX_NELEM*MAX_NELEM;i++)
        {
        printf("myArray1[%d] =%d\n", i, *ptr1);
        ptr1++;
        }

        for (i=0;i<m;i++)
        free((void *) myArray1[i]);
        free((void **) myArray1);

    }