/*
 * pr_02.c
 *
 *  Created on: Jun 11, 2013
 *      Author: delmadord
 */


// Prints a one-month reminder list, only part (a) is done
#include <stdio.h>
#include <string.h>

#define MAX_REMIND 50
#define MSG_LEN 60

int read_line(char str[], int n);

int main(void) {
	char reminders[MAX_REMIND][MSG_LEN + 3];
	char day_str[3], msg_str[MSG_LEN + 1];
	int day, i, j, num_remind = 0;

	while (1) {
		if (num_remind == MAX_REMIND) {
			printf("-- No space left --n");
			break;
		}

		printf("Enter day reminder: ");
		scanf("%2d", &day);
		if (day == 0)
			break;
		if (day < 0 || day > 31)
			continue;
		sprintf(day_str, "%2d", day);
		read_line(msg_str, MSG_LEN);

		for (i = 0; i < num_remind; i++)
			if (strcmp(day_str, reminders[i]) < 0)
				break;
		for (j = num_remind; j > i; j--)
			strcpy(reminders[j], reminders[j - 1]);

		strcpy(reminders[i], day_str);
		strcat(reminders[i], msg_str);

		num_remind++;
	}

	printf("\nDay Reminder\n");
	for (i = 0; i < num_remind; i++)
		printf(" %s\n", reminders[i]);

	return 0;
}

int read_line(char str[], int n) {
	int ch, i = 0;

	while ((ch = getchar()) != '\n')
		if (i < n)
			str[i++] = ch;
	str[i] = '\0';
	return i;
}