#include <stdio.h>

/**
 * Passing 2d array as array
 * note that the second dimension MUST be specified
 * The first may be, but it is not required.
 * @param fd -- the size of the first array dimension
 * @param sd - the size of the second array dimension
 * @param grid -- the array
 **/
int t(int fd,  int sd, int grid[fd][sd])
{
    for (int i=0; i<fd; i++)
	for (int j=0; j<sd; j++)
	    printf("t1 %d %d: %d\n", i, j, grid[i][j]);
}


/**
 * Passing 2d array as a pointer
 * Then print using pointer math doing essentially the same work as array math
 * @param fd -- the size of the first array dimension
 * @param sd - the size of the second array dimension
 * @param grid -- the array
 **/
int t2(int fd,  int sd, int *grid)
{
    for (int i=0; i<fd; i++)
	for (int j=0; j<sd; j++)
	    printf("t2 %d %d: %d\n", i, j, *(grid+i*sd+j));
}


/**
 * Passing 2d array as a pointer
 * Then print using simpler pointer math being confident of row major allocation
 * @param fd -- the size of the first array dimension
 * @param sd - the size of the second array dimension
 * @param grid -- the array
 **/
int t3(int fd,  int sd, int *grid)
{
    for (int i=0; i<fd; i++)
	for (int j=0; j<sd; j++)
	    printf("t3 %d %d: %d\n", i, j, *(grid++));
}
/**
 * Passing 2d array as a pointer
 * Then print using simpler pointer math being confident of row major allocation
 * @param fd -- the size of the first array dimension
 * @param sd - the size of the second array dimension
 * @param grid -- the array
 **/
int t4(int fd,  int sd, int *grid)
{
    for (int i=0; i<fd*sd; i++)
	printf("t4 %d: %d\n", i, *(grid++));
}


/**
 * Passing 3d array as array
 * note that the second and third dimension MUST be specified
 * The first may be, but it is not required.
 * @param fd -- the size of the first array dimension
 * @param sd - the size of the second array dimension
 * @param td -- thrid dimension
 * @param grid -- the array
 **/
int u(int fd,  int sd, int td, int grid[][sd][td])
{
    for (int i=0; i<fd; i++)
	for (int j=0; j<sd; j++)
	    for (int k=0; k<td; k++)
		printf("t1 %d %d %d : %d\n", i, j, k, grid[i][j][k]);
}


/**
 * Passing 2d array as a pointer
 * Then print using pointer math doing essentially the same work as array math
 * @param fd -- the size of the first array dimension
 * @param sd - the size of the second array dimension
 * @param grid -- the array
 **/
int u2(int fd,  int sd, int td, int *grid)
{
    for (int i=0; i<fd; i++)
	for (int j=0; j<sd; j++)
	    for (int k=0; k<td; k++)
	    printf("t2 %d %d: %d\n", i, j, *(grid+i*sd*td+j*td+k));
}

void main()
{
    int mgrid[3][5];  // Note that this is stored as int (*)[5] -- ie an array of pointers to arrays of length 5
    for (int i=0; i<3; i++)
	for (int j=0; j<5; j++)
	{
	    mgrid[i][j]=(i+1)*100+j;
	}
    t(3, 5, mgrid);
    t2(3, 5, (int *)mgrid);
    t4(3, 5, (int *)mgrid);

    int mmgrid[2][3][4];
    for (int i=0; i<2; i++)
        for (int j=0; j<3; j++)
            for (int k=0; k<4; k++)
		mmgrid[i][j][k] = i*1000 + j*100 + k*10;
    u(2,3,4, mmgrid);  // int (*)[3][4]
    u2(2,3,4, (int *)mmgrid);  // int (*)[3][4]
    t(3,4,mmgrid[0]);
    
}