NurseScheduler

#include "stdafx.h"
#include <stdlib.h>
#include <time.h>

char *names[] = { "Denise", "Inja", "Jane", "Karen", "Maggie", "Margaret", "MJ", "Queen", "Sherri", NULL }; //ptr for names, 9 nurses
const char days[5][10] = { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" };
int randomNurse();
#define total_nurses 9 //number of nurses on staff
#define days_in_week 5 //number of work days in a week


int main() {

    srand(time(NULL));
    int day, pos, candidate, i, j;
    int slackers[4] = { 1, 1, 1, 1 }; //array that holds the selections for who isn't working
    char **name_ptr = names;
    /*0 = Denise, 1 = Inja, 2 = Jane, 3 = Karen, 4 = Maggie, 5 = Margaret, 6 = MJ, 7 = Queen, 8 = Sherri*/
    int avail_nurses[total_nurses] = { 1, 1, 1, 1, 1, 1, 1, 1, 1 }; //holds the status of each nurse, 0 = unavailable, 1 = available

    /*prints names */
    int temp_counter = 1; //counter
    while (*name_ptr) {
        printf("%i) %s\n", temp_counter, *name_ptr);
        name_ptr++;
        temp_counter++;
    }

    /*this assumes that no more than FOUR nurses will be away on any given week*/
    printf("\nEnter numbers that correspond to the nurses who won't be available for the week.\nType up to four numbers, each separated by a space.\n");
    printf("When you are done, press \"Enter\".\n");
    printf("If less than four nurses will be on leave, type a \"0\" in place of a selection.\n");
    printf("Example: 1 2 5 0\n\n\n");

    /*week selection of unavailable nurses*/
        do {
            printf("Who won't be here?  ");
        } while (scanf("%i %i %i %i", &slackers[0], &slackers[1], &slackers[2], &slackers[3]) != 4);

    /*checks the selections made, and sets the available nurses to the correct value, zero if they are slacking||vacationing*/
    for (int n = 0; n < 4; n++) {
        int slacker = slackers[n];
        if (slacker >= 1 && slacker <= 9)
            avail_nurses[slacker] = 0; //set to zero since that nurse isn't working
    }


    /*-----WEEKLY_ASSIGNMENT-----*/
    int pos_per_day[days_in_week] = { 5, 9, 9, 8, 5 }; //number of nurses needed each day

    int selection[days_in_week][total_nurses]; //the selected nurses per day

    for (i = 0; i < days_in_week; i++) {
        for (j = 0; j < total_nurses; j++) {
            selection[i][j] = -1; //initialize to -1 which means no nurse is selected
        }
    }

    //fill all the days of week
    for (day = 0; day < days_in_week; day++) {
        for (pos = 0; pos < pos_per_day[day]; pos++) { //for every position needed that day
            do {
                candidate = randomNurse();
            } while (!avail_nurses[candidate]); //looks for available nurses (phrasing)

            avail_nurses[candidate] = 0;  //change nurses status to not available
            selection[day][pos] = candidate;  //fill the output array with appropriate nurse
        }
        for (i = 0; i < total_nurses; i++) {
            avail_nurses[i] = 1; //initialize the nurses status for next day use
        }
        for (int n = 0; n < 4; n++) { //make sure we shame the slackers...
            int slacker = slackers[n];
            if (slacker >= 1 && slacker <= 9)
                avail_nurses[slacker] = 0;
        }
    }

    /*-----PRINTS SCHEDULE FOR WEEK-----*/
    for (i = 0; i < days_in_week; i++) {
        printf("%-10s: ", days[i]);
        for (j = 0; j < total_nurses; j++) {
            if (selection[i][j] != -1)
                printf("%-10s ", names[selection[i][j]]);
        }
        printf("\n");
    }
    return 0;
}

/*function to generate random nurse*/
int randomNurse() {

    return rand() % 9; //random number 0-8, to pick nurse
}