Question

How to iterate 2D array (matrix) with pointers in C

Answer 1

#include <stdio.h>

#define ROWS 3
#define COLS 2

int main(void) {
    int arr[ROWS][COLS] = {
        {1, 2},
        {3, 4},
        {5, 6}
    };

    int (*p1)[2] = arr; // rows

    int *p2 = NULL; // cols

    for (; p1 != arr + ROWS; p1++) {
        for (p2 = *p1; p2 != *p1 + COLS; p2++) {
            printf("%d ", *p2);
        }
        printf("\n");
    }

    return 0;
}



/*
run:

1 2 
3 4 
5 6 

*/

 

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