/**
 * Similar to reader0 but uses malloc to dynamically allocate memory
 * @author gtowell
 * Created: March 2021
 * **/

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

#ifndef NULL
#define NULL (void *)0
#endif

#define MAX_LINES 16

int main(int argc, char* argv[])
{
    char* a[MAX_LINES];

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

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

    char line[MAX_LINES / 2+1];
    int linecount=0;
    while (fgets(line, MAX_LINES/2+1, f)) {
	    int llen = strlen(line);
	    char* nline = malloc((llen+1)*sizeof(char));
        if (nline==NULL) {
            fprintf(stderr, "Malloc failed");
        }
        strcpy(nline, line);
	    //printf(nline);
	    a[linecount++]=nline;
    }

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

    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]);
    
}