/**
 * Another program to read all the lines of a file into an array.
 * But in this case, allocate teh array differently than reader0.c
 * @author gtowell
 * Created: March 2021
 * **/

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

#define MAX_LINES 16

int main(int argc, char* argv[])
{
    // Allocate an array that stores only pointers to strings
    // This is very different from a 2d array of strings
    char* a[MAX_LINES];

    // show the pointers and the location that those pointers are stored at 
    for (int i = 0; i<MAX_LINES; i++)
        printf("%d %d %d\n", i, &a[i], a[i]);

    FILE *f = fopen(argv[1], "r");
    if (!f) {
	    fprintf(stderr, "No such file\n");
	    return 1;
    }

    char line[MAX_LINES / 2+1];
    int linecount=0;
    while (fgets(line, MAX_LINES/2+1, f)) {
        // copy line into the array
        // but not really
	    a[linecount++]=line;
    }

    for (int i=0; i<linecount; i++)
	    printf(a[i]);

    for (int i = 0; i<MAX_LINES; i++)
        printf("%d %d %d\n", i, &a[i], a[i]);

}