Please!!!! help me write this program (Do not hold the auditorium in memory. Utilize random file access to view and modify the auditorium)

Question

Adult - $10

Child - $5

Senior - $7.50

Sample Theatre

ABCDEFGHIJKLMNOPQRST

1 ...AA..CSSAC........

2 ACSAACCA....AAAA..SS

3 .........AS.........

4 C.A.S.A.S.C.S.C.A.A.

5 AACACSSA.CCSSS.AAACC

If user wants to reserve seats, display the current

seating availability for that auditorium.

ABCDEFGHIJKLMNOPQRST

1 ...##..#####........

2 ########....####..##

3 .........##.........

4 #.#.#.#.#.#.#.#.#.#.

5 ########.#####.#####

Do not hold the auditorium in memory

1. Utilize random file access to view and modify the auditorium

Input validation

Parameter: input string

Return: Boolean

1. Parse string character by character
2. If invalid character, return false
3. Return True

Best Available

Parameter: row, total quantity

Return: starting seat

1. Open file
2. For 1 to N-x+1 (N = number seat in a row, X = total number of tickets)
3. For 1 to total quantity
4. Read character
5. If character != period
6. Break
7. If loop ends and all seats checked are empty
8. calculate distance
9. (outer loop counter + (total quantity-1)/2 - (N+1)/2
10. Keep smallest distance and starting seat number
11. Close file
12. Return starting seat number
13. -1 if no best seats available

Display Auditorium

Parameter: none

Return: nothing

1. Open file
2. display column header
3. While not EOF
4. Read lines
5. Display row number
6. Display line
7. change character to #
8. close file

Reserve Seats

Parameter: row, seat, adult quantity, senior quantity, child quantity

Return: nothing

1. Open file
2. Move file pointer to proper row
3. Move file pointer to proper character (seat)
4. For each ticket type
5. For 1 to quantity
6. Write appropriate letter to file
7. Close file

Check Availability

Parameter: row, seat, total quantity

Return: Boolean

1. Open file
2. Move file pointer to proper row
3. Move file pointer to proper character (seat)
4. For 1 to quantity
5. Read character
6. If character is not a period
7. Close file
8. Return false
9. Close file
10. Return true

Display Report

Parameter: none

Returns: nothing

1. Open file
2. While not EOF
3. Read character
4. Increment appropriate counter on character read
5. A = adult, S = senior, C = child, period = empty
6. Print report
7. Total seats
8. Total sold
9. Adult Sold
10. Child sold
11. Senior sold
12. Total sales
13. Close file

Main

1. Loop (do...while not exit)
2. Print main menu
3. Get user input
4. If user does not want to exit
5. Display auditorium
6. Ask user for row, seat and quantities (adult, child, senior)
7. Validate input for each input
8. Loop if not valid
9. Check if seats are available
10. If available reserve seats
11. If seats not available
12. Find best available seats
13. Ask user to reserve best available ( if found)
14. If user accepts
15. Reserve seats
16. Print Report

Answer 1

I wish to discuss the design of this program in greater detail. There is much more that needs to be addressed.

For example:

(1) is there more than 1 auditorium ( file) involved???

(1) How are the reserved seats assigned the values {A,S,C}

(2) are the prices stored in a file, as the each auditorium can charge difference prices

(3) each auditorium has a different layout ( # of rows, # of seats per row)

(4) sales statistics for each auditorium kept in the same file or different file

(5) how are the seats selections actually made? you can search each row for the

appropriate number of empty seats and then report that row as available

(6) more than one report can be generated: sales and seats

Availability can be checked with the strstr function as shown in the program below. It creates an

auditorium file 5 rows x 20 seats per row, then reserves 10 seats in row 3 seats 7-16.

Finally it looks for available rows of 20 seats, which shall be rows #1,2,4,5.

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#include <stdio.h>

#include <stdlib.h>

#include <string.h>

int main()

{

//creates a file with empty auditorium: 5 rows x 20 seats per row = 100

FILE * fptr = fopen("datafile.dat","wb");

char outbuff[100];

memset(outbuff,'0',100);

fwrite(outbuff,sizeof(char),100,fptr);

fclose(fptr);

//populates a row of 10 seats, row #3 seats 7

fptr = fopen("datafile.dat","rb+");

int rowNum=2;

int seatNum=7;

sprintf(outbuff,"SACSCAASCA");

fseek(fptr,rowNum*20+seatNum,SEEK_SET);

fwrite(outbuff,sizeof(char),10,fptr);

fclose(fptr);

char buff[20];

fptr = fopen("datafile.dat","rb+");

int iLoop;

//looks for rows that can hold 20 guests: rows #1,2,4,5

for (iLoop=0; iLoop<5; iLoop++)

{

fread(buff,sizeof(char),20,fptr);

if (strstr(buff,"00000000000000000000")!=NULL)

{

printf(" seats available at row # %d \n",(iLoop+1));

}

}

fclose(fptr);

}