double_matrix

/*
 * DMatrix.c
 *
 *  Created on: Mar 14, 2013
 *      Author: none
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void    print_int_array         (int *src, size_t size){
    int i;

    for (i = 0; i < size; i++){
        printf("-%i) [%p] -> (%d)   ", i, (src + i), src[i]);
    }
    printf("\n\n");
}


int main (int argc, char **argv){
    int     **first_matrix = NULL;
    int     ****double_matrix = NULL;

    int     *array_to_copy;

    int     rows, cols;
    int     i, j;

    puts("Enter rows and the cols");
    scanf("%d\n%d", &rows, &cols);

    //WHAT IS first_matrix? POINTER TO INT*, SO CAST WILL BE INT**
    first_matrix = (int**)malloc(sizeof(int*) * rows);

    //WHAT IS first_matrix[i]? POINTER TO INT, SO CAST WILL BE INT*
    for (i = 0; i < rows; i++){
        first_matrix[i] = (int*) malloc (sizeof(int) * cols);
    }

    //OK, IN first_matrix EACH ELEMENT IS OF TYPE INT*, SO MANY POINTERS TO INT (OR MANY INT ARRAYS). I'M GOING TO USE array_to_copy
    //WHICH HAS cols TO COPY IT ON EACH first_matrix[i]
    array_to_copy = (int*) malloc (sizeof(int) * cols);
    for (i = 0; i < cols; i++){
        array_to_copy[i] = i;
    }

    //LET'S CROSS EACH first_matrix[i] AND COPY IT'S VALUE FROM array_to_copy
    for (i = 0; i < rows; i++){
        for (j = 0; j < cols; j++){
            first_matrix[i][j] = array_to_copy[j];
        }
    }

    //LET'S PRINT EACH first_matrix[i]
    puts("array_to_copy:");
    print_int_array(array_to_copy, cols);

    puts("\nfirst_matrix:");
    for (i = 0; i < rows; i++){
        print_int_array(first_matrix[i], cols);
    }


    for (i = 0; i < rows; i++){
        free(first_matrix[i]);
    }
    free(first_matrix);
    free(array_to_copy);
    return 0;
}