#include <stdio.h>
#include <stdlib.h>
#include <explode.c>
#include <fopenmkdir.c>
#include <limits.h>
#include <strlcpy.c>
#include <strlcat.c>
#include <string.h>
#define POT 0
#define CAS 1
#define JUTRO 1337

int main(int argc, char *argv[]) {
	if(argc != 1+3) {
		fprintf(stderr, "uporaba: %s <csv ločilo> <pot stolpec 0-999> <čas stolpec 0-999>\n", argv[0]);
		return 1;
	}
	char *delim = argv[1];
	int stolpec[2];
	stolpec[POT] = atoi(argv[2]);
	stolpec[CAS] = atoi(argv[3]);
	char **list;
	size_t i, len;
	char line[1337];
	int iter = 0;
	double *values;
	fgets(line, 1337, stdin);
	line[strcspn(line, "\n")] = 0;

	while(1) {

		explode(line, delim, &list, &len);

		if(iter == 0) {
			values = malloc(sizeof(double) * 2); // len); // potrebujemo prostor samo za čas in pot
		}

		for(int j = 0; j < len; j++)
			fprintf(stdout, "%s%s", list[j], delim);

		fprintf(stdout, "%f\n",
			( atof(list[stolpec[POT]]) - values[POT] )
				/
			( atof(list[stolpec[CAS]]) - values[CAS] )
		);

		values[CAS] = atof(list[stolpec[CAS]]);
		values[POT] = atof(list[stolpec[POT]]);

		/* free list */
		for(i = 0; i < len; ++i) {
			free(list[i]);
		}

		free(list);

		fgets(line, 1337, stdin);

		if(feof(stdin)) {
			break;
		}
		// fprintf(stderr, "d: %s", line);
		line[strcspn(line, "\n")] = 0;

		iter++;
	}
	free(values);
	return 0;
}