Question

How to set two pointers to the first and the last elements in a matrix with C

Answer 1

#include <stdio.h>

#define ROWS 3
#define COLS 4

int main() {
    // Define a 2D array (matrix)
    int matrix[ROWS][COLS] = {
        { 1,  4,  6,  9},
        {11, 17, 18, 29},
        {32, 38, 40, 70}
    };

    // Pointer to the first element of the matrix
    int *first = &matrix[0][0];

    // Pointer to the last element of the matrix
    int *last = &matrix[ROWS - 1][COLS - 1]; 

    // Print the values using the pointers
    printf("First element: %d\n", *first);
    printf("Last element: %d\n", *last);

    // Print the address using the pointers
    printf("First element: %p\n", first);
    printf("Last element: %p\n", last);

    return 0;
}


/*
run:

First element: 1
Last element: 70
First element: 0x7fff299cc530
Last element: 0x7fff299cc55c

*/

 

70+ SQL courses for beginners and professionals