#include <stdio.h>

void pEvenDouble(int firstD, int secondD, int* tdArray)
{
    int fd=0;
    int sd=0;
    for (int i=0; i<firstD*secondD; i++)
    {
	if (fd%2==0  && sd%2==0)
	    printf("P%d  %d  %d\n", fd, sd, *(tdArray+fd*secondD+sd));
	sd++;
	if (sd>=secondD)
	{
	    sd=0;
	    fd++;
	}
    }
}

void aEvenDouble(int firstD, int secondD, int tdArray[][secondD])
{
    for (int i=0; i<firstD; i=i+2)
	for (int j=0; j<secondD; j=j+2)
	    printf("A%d  %d  %d\n", i, j, tdArray[i][j]);
}

int main(void)
{
    int aa[][7] = {{1,2,3,4,5,6,7}, {2,3,4,5,6,7,8}, {3,4,5,6,7,8,9}, {4,5,6,7,8,9,0}, {5,6,7,8,9,0,1}};
    aEvenDouble(5, 7, aa);
    pEvenDouble(5, 7, (int*)aa);
}