3.2.1. QBASIC File Handling Programming Solutions - SEE COMPUTER SCIENCE 2080
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1. Write a program to store Roll no., Name, Class and Address of any five students. [SEE 2074]
OPEN "Student.dat" FOR OUTPUT
AS #1
FOR I = 1 TO 5
INPUT "Enter Roll No."; r
INPUT "Enter Name"; n$
INPUT "Enter Class"; c
INPUT "Enter Address"; a$
WRITE #1, r, n$, c, a$
NEXT I
CLOSE #1
END
2. A sequential data file called
“student.dat” contains same records under the field’s name, english, nepali and
computer. Write a program to add some more records in the same sequential data
file. [SLC 2068]
OPEN “student.dat” FOR APPEND AS #1
DO
CLS
INPUT “ENTER NAME”; N$
INPUT “ENTER MARKS IN ENGLISH”; E
INPUT “ENTER MARKS IN NEPALI”; N
INPUT “ENTER MARKS IN COMPUTER”; C
WRITE #1, N$, E, N, C
INPUT “DO YOU WANT TO CONTINUE”; CH$
LOOP WHILE UCASE$(CH$) = “Y”
CLOSE #1
END
3. A
sequential data file “RECORD.DAT” and store Name, Address and Salary of
employees of an office. WAP to add some more records in the data file
“RECODR.DAT”. The program should terminate with user choice.
OPEN “RECORD.DAT” FOR APPEND AS #1
DO
CLS
INPUT “ENTER NAME”; N$
INPUT “ENTER MARKS IN ENGLISH”; E
INPUT “ENTER MARKS IN NEPALI”; N
INPUT “ENTER MARKS IN COMPUTER”; C
WRITE #1, N$, E, N, C
INPUT “DO YOU WANT TO CONTINUE”; CH$
LOOP WHILE UCASE$(CH$) = “Y”
CLOSE #1
END
4. Create a data file to store the records
of few employees having Name, Address, Post, Gender and Salary fields. [SEE
2073]
OPEN “std.rec” FOR OUTPUT AS #1
TOP:
CLS
INPUT “Enter Name”; N$
INPUT “Enter Address”; A$
INPUT “Enter Post”; P$
INPUT “Enter gender”; G$
INPUT “Enter Salary”; S
WRITE #1, N$, A$, P$, G$, S
INPUT “Do you want to continue”; CH$
IF UCASE$(CH$)=”Y” THEN GOTO TOP
CLOSE #1
END
5. Create
a sequential data file ’Price.dat’ to store item name, quantity and Rate also
calculate total amount(total=Quantity X Rate).Program should terminate
according to the user’s choice.
OPEN “price.dat” FOR OUTPUT AS #1
TOP:
CLS
INPUT “Enter Item Name”; N$
INPUT “Enter Quantity”; Q
INPUT “Enter Rate”; R
T = Q * R
WRITE #1, N$, Q, R, T
INPUT “Do you want to continue”; CH$
IF CH$=”Y” OR CH$ = “y” THEN GOTO TOP
CLOSE #1
END
6. Create
a sequential data file’post.dat’ to store name and marks of any three subjects
also calculate total and percentages only for 15 students.
OPEN "post.dat"
FOR OUTPUT AS #1
FOR I = 1 TO 15
INPUT "Enter Name"; n$
INPUT "Enter marks in any three subjects”;
A, B, C
T = A + B + C
P = T / 3
WRITE #1, n$, A, B, C, T, P
NEXT I
CLOSE #1
END
7. Store
SIDNO, name, address and Telephone number of five students and display the
records on monitor in sequential data file “STDINFO”
OPEN "STDINFO.DAT" FOR OUTPUT AS #1
FOR I = 1 TO 5
CLS
INPUT "ENTER NAME"; N$
INPUT "ENTER ADDRESS"; A$
INPUT "ENTER TELEPHONE"; T#
WRITE #1, N$, A$, T#
NEXT I
CLOSE #1
OPEN "STDINFO.DAT" FOR INPUT AS #1
CLS
FOR I = 1 TO 5
INPUT #1, N$, A$, T#
PRINT N$, A$, T#
NEXT I
CLOSE #1
END
8. A
sequential data file “Address.inf” contains serial no, name, address, telephone
and email_id.WAP to record as many records as the user wants. The serial number
should be generated automatically like 5001,5003,5005.
OPEN " Address.inf " FOR OUTPUT AS
#1
DO
CLS
C = 5001
INPUT “ENTER NAME”; N$
INPUT “ENTER ADDRESS”; A$
INPUT “ENTER TELEPHONE”; T#
INPUT “ENTER EMAIL”; E$
WRITE #1, C, N$, A$, T$, E$
C = C + 2
INPUT “DO YOU WANT TO CONTINUE (Y / N)”; CH$
LOOP WHILE UCASE$(CH$) = “Y”
CLOSE #1
END
9. A Sequential data file called
"SEE.DAT" has stored data under the field heading Symbol No., Name,
English, Nepali, and Computer. Write a program to display all the information
of those students whose marks in Computer is more than 80.
OPEN "SEE.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT #1, A, B$, C, D, E
IF
E > 80 THEN PRINT A, B$, C, D, E
WEND
CLOSE #1
END
10. A sequential data file “STD.TXT”
contains name and marks in three different subjects of some students. Write a
program to display only fail student’s records assuming pass marks 40.
OPEN "STD.TXT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT #1, B$, C, D, E
IF
C < 40 AND D <40 AND E <40 THEN PRINT B$, C, D, E
WEND
CLOSE #1
END
11.Write a program which
reads records from the file ”Result.DAT” having the fields name, and marks of
three different subjects and display only those records whose percentage is
greater than 60 and less than 80. Also count the total number of records presenting
in that data files.
OPEN "STD.TXT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT #1, B$, C, D, E
A=A+1
T=C+D+E
P=T/3
IF
P > 60 AND P < 80 THEN PRINT B$,
C, D, E
WEND
PRINT “TOTAL NO. OF RECORDS=”; A
CLOSE #1
END
12. Write a program to read all the records
from the data file “STUDENT.TXT” and display all the records where the fields
name are unknown.
OPEN "STUDENT.TXT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
LINE
INPUT #1, A$
PRINT A$
WEND
CLOSE #1
END
13. A data file "pabson.txt" contains the records
composed of the fields like school, principal, address, contact. Write a
program in Qbasic to display records of the schools located in either Kathmandu
or Palpa
OPEN "PABSON.TXT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, A$, B$, C$, D
IF
UCASE$(C$) = “KATHMANDU” OR UCASE$(C$) = “PALPA” THEN PRINT A$, B$, C$, D
WEND
CLOSE #1
END
14. A
data file “INFO.DAT” has numerous records in it with name, address age, and
telephone numbers in it. Write a program to read all the records and print
those with address “NEPAL” and age >15
OPEN "INFO.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, A$, B$, C, D
IF
UCASE$(B$) = “NEPAL” AND C >15 THEN PRINT A$, B$, C, D
WEND
CLOSE #1
END
15. A sequential data
file called 'ADDRESS.DAT' contains NAME, AGE, CITY and TELEPHONE fields. Write
a program to display all the contents of that data file.
OPEN "ADDRESS.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, A$, B, C$, D
PRINT A$, B, C$, D
WEND
CLOSE #1
END
16. A data file “lib.txt”
consists of book’s name, author’s name and price of books. Write a program to
count and display the total number of records present in the file.
OPEN "LIB.TXT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, A$, B$, C
D = D + 1
WEND
PRINT “TOTAL NUMBER OF RECORDS=”; D
CLOSE #1
END
17. Write a program in QBASIC to open a
sequential data file “EMP.DAT”, which contains employees records: Name, address
and phone number and display all the records as well as total number of records
stored in the file.
OPEN "LIB.TXT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, A$, B$, C
PRINT A$, B$, C
D = D + 1
WEND
PRINT “TOTAL NUMBER OF RECORDS=”; D
CLOSE #1
END
18. A sequential data file named “nabil.txt”
contains record of clients of a bank including depositor’s name, deposited
amount, time and rate of interest. Wap to display detail of all depositors
including simple interest.
OPEN "NABIL.TXT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, N$, P, T, R
I=P*T*R/100
PRINT A$, B$, C, I
WEND
CLOSE #1
END
19. A
sequential data file “SALARY.DAT” contains the information, Employee-Code,
Employee-Name, Post, Basic-Salary. Write a program to display those records
whose Basic-salary is between 10000 to 15000 and Post is ‘OFFICER’.
OPEN "SALARY.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, E,, N$, P$, S
IF
UCASE$(P$) = “OFFICER” AND S >= 10000 AND S>= 15000 THEN PRINT A$, B$, C,
D
WEND
CLOSE #1
END
20. A
data file name “EMP.DAT”, contains number of records having fields name, post
and salary. Write a program to count total number of “Manager” in the data
file. (hint: Manager is a post)
OPEN "EMP.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, N$, P$, S
IF
UCASE$(P$) = “MANAGER” THEN PRINT C = C + 1
WEND
PRINT “TOTAL NO.OF MANAGERS ARE”; C
CLOSE #1
END
21. A sequential data file “emp.dat”
contains name, post and salary fields of information about employees. Write a
program to display all the information of employees along with tax amount (also
tax is 15% of salary).
OPEN "EMP.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, N$, P$, S
T =
15 / 100 * S
PRINT N$, P$, S, T
WEND
CLOSE #1
END
22. A data file “Salary.Dat” contains the
information of employee regarding their name, post and salary. Write a program
to display all the information of employee whose salary is greater than 15000
and less than 40000.
OPEN "EMP.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, N$, P$, S
IF
S >= 15000 AND S <= 40000 THEN PRINT N$, P$, S
WEND
CLOSE #1
END
23. Write a program that reads the
”INFO.DAT” file that has several record such as name, address, gender, post,
and salary .The program display those record whose sex is male and salary more
than 10,000 and also the program counts the total number of records in that
file.
OPEN "INFO.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, N$, A$, G$, P$, S
C = C + 1
IF UCASE$(G$)=”M” AND S >= 10000 THEN
PRINT N$, A$, G$, P$, S
WEND
PRINT “TOTAL NUMBER OF RECORDS=”; C
CLOSE #1
END
24. A sequential data file’post.dat’ has few
records related to name, address, salary.WAP to display the records whose
address begins with ‘S’ or ‘D’
OPEN "POST.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, N$, P$, S
A$ = UCASE$(LEFT$(N$,1))
IF A$ = “S” OR A$ = “D” THEN PRINT N$, P$, S
WEND
CLOSE #1
END
25. Write a program to open a data file
“record.dat” that contains name, address, date of birth, email and telephone
number of some employees. Now display all those records whose date of birth is
in current month.
OPEN
"birth.dat" FOR INPUT AS #1
CLS
WHILE NOT
EOF(1)
INPUT #1, n$, d$, a$
b$ = LEFT$(DATE$, 2)
c = VAL(b$)
e$ = LEFT$(d$, 2)
f = VAL(e$)
IF c = f THEN PRINT n$, d$, a$
WEND
CLOSE #1
END
26. A sequential data file “Record.dat” has
few records related to name, address, post and DOB(mm/dd/yyyy). WAP to display
the records of all those who were born between 1971 to 1999.
OPEN
"RECORD.dat" FOR INPUT AS #1
CLS
WHILE NOT
EOF(1)
INPUT #1, n$, a$, p$, d$
d$ = RIGHT$(d$, 4)
c = VAL(b$)
IF c >= 1971 and c<=1999 THEN PRINT n$, d$, a$
WEND
CLOSE #1
END
27. Write a Qbasic program that read the "EMP.DAT"
file with Name, Address, Post and Salary columns from E: drive that has 500
records of employees and displays only its last 50 records.
OPEN "E:\EMP.DAT"
FOR INPUT AS #1
CLS
FOR i = 1
TO 500
INPUT #1, n$, a$, p$, s
IF i >= 450 AND i <= 500 THEN PRINT n$, a$, p$, s
NEXT i
CLOSE #1
END
28. A sequential data file has 100 records
having field name, class and roll number. Write a program to display from 50th
to 60th records.
OPEN "ABC.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, N$, C, R
D = D + 1
IF D >= 50 AND D <= 60 THEN PRINT N$,
C, R
WEND
CLOSE #1
END
29. Write a program to display the first 10
records from a file named “resource.dat” having fields name, phone and email.
OPEN "RESOURCE.DAT" FOR INPUT AS #1
CLS
FOR I = 1 TO 10
INPUT
#1, N$, C, R
PRINT N$, C, R
NEXT I
CLOSE #1
END
30. A data file named “EMP.DAT” contains
some records with the fields Code, Name, Post and Salary. Write a program to
print odd position records of the data file.
OPEN "EMP.DAT" FOR INPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, C, N$, P$, S
D = D + 1
IF MOD 2 = 1 THEN PRINT C, N$, P$, S
WEND
CLOSE #1
END
31. A sequential data file named “abc.dat”
has several records having fields name, roll and class. Write a program to copy
all the records of class 10 into a newly created file new.dat.
OPEN "ABC.DAT" FOR INPUT AS #1
OPEN "COPY.DAT" FOR OUTPUT AS #1
CLS
WHILE NOT EOF (1)
INPUT
#1, N$, R, C
IF C = 10 THEN WRITE #2, N$, R, C
WEND
CLOSE #1, #2
END
32. A data file named “record.dat” contains
name, age and salary for n number of persons. Write a program to input a name
to search data from a data file. If the data is not found, then display the
message “Data not found in the list”.
OPEN “RECORD.DAT” FOR INPUT AS #1
CLS
INPUT “Enter name to be searched”; S$
FLAG=0
WHILE NOT EOF(1)
INPUT #1, N$, A$, S
IF UCASE$(S$)=UCASE$(N$) THEN
PRINT N$, A$, S
FLAG=1
END IF
WEND
IF FLAG=0 THEN PRINT “Data not found”
CLOSE #1
END
33. A
sequential data file 'Student.dat' contains registration number, student name,
address and date of birth of some students. Write a program that asks a user to
input a registration number and displays the record of the particular
registration if present.
OPEN “STUDENT.DAT” FOR INPUT AS #1
CLS
INPUT “Enter registration no. to be searched”; S
FLAG=0
WHILE NOT EOF(1)
INPUT #1, R, N$, A$, D$
IF S = R THEN
PRINT R, N$, A$, D$
FLAG=1
END IF
WEND
IF FLAG=0 THEN PRINT “Data not found”
CLOSE #1
END
34. WAP
that asks a post of the employee and displays his/her records from the
sequential data file “XYZ.REC” having fields Name, Post, Dept and Salary.
OPEN “XYZ.REC” FOR INPUT AS #1
CLS
INPUT “Enter post to be searched”; S$
FLAG=0
WHILE NOT EOF(1)
INPUT #1, N$, P$, D$, S
IF UCASE$(S$)=UCASE$(P$) THEN
PRINT N$, P$, D$, S
FLAG=1
END IF
WEND
IF FLAG=0 THEN PRINT “Data not found”
CLOSE #1
END
35. Delete some records from “neps.dat” file where computer ask user
to enter the record, which is to be deleted. (Fields are name, address, and
telephone number)
OPEN “NEPS.DAT” FOR INPUT AS #1
OPEN “TEMP.DAT” FOR OUTPUT AS #1
CLS
INPUT “Enter name which is to be deleted”; D$
WHILE NOT EOF(1)
INPUT #1, N$, A$, T#
IF UCASE$(D$)<>UCASE$(N$) THEN
WRITE #2, N$, A$, T#
ELSE
PRINT “Deleted data=”; N$, A$, T#
END IF
WEND
CLOSE #1, #2
KILL “NEPS.DAT”
NAME “TEMP.DAT” AS “NEPS.DAT”
END
36. A sequential data file “marks.dat” contains information such as
student’s name, marks obtained in math, science and computer. Write a program
that increase the marks of computer by 10 of those student who secured less
than 40
OPEN "D:\PATIENT.DAT" FOR INPUT AS
#1
OPEN "d:\TEMP.DAT" FOR OUTPUT AS #2
CLS
WHILE NOT EOF(1)
INPUT #1, N$, A, B, C
IF
C > 40 THEN
WRITE #2, N$, A, B, C
ELSE
C = C + 10
WRITE #2, N$, A, B, C
END IF
WEND
CLOSE
KILL "D:\PATIENT.DAT"
NAME "D:\TEMP.DAT" AS
"D:\PATIENT.DAT"
END
37. A sequential data file “RECORD.DAT”
contains different records under fields: name rollno., name, address and
percentage. Write a program to edit a record and display both edited and
unedited records on the screen to compare them side by side.
OPEN "D:\RECORD" FOR INPUT AS #1
OPEN "d:\TEMP.DAT" FOR OUTPUT AS #2
CLS
INPUT "ENTER ROLL NUMBER TO EDIT DATA"; E
FLAG = 0
WHILE NOT EOF(1)
INPUT #1, R, N$, A$, P
IF E <> R THEN
WRITE #2, R, N$, A$, P
ELSE
INPUT "ENTER ROLL NUMBER"; ER
INPUT "ENTER NAME"; EN$
INPUT "ENTER ADDRESS"; EA$
INPUT "ENTER PERCENTAGE"; EP
WRITE #2, ER, EN$, EA$, EP
FLAG = 1
END IF
WEND
IF FLAG = 0 THEN
PRINT "DATA NOT FOUND"
ELSE
PRINT "NON EDITED DATA"
PRINT "ROLL NUMBER= "; R
PRINT "NAME= "; N$
PRINT "ADDRESS= "; A$
PRINT "PERCENTAGE= "; P
PRINT "---------------"
PRINT "EDITED DATA"
PRINT "ROLL NUMBER: "; ER
PRINT "NAME: "; EN$
PRINT "ADDRESS: "; EA$
PRINT "PERCENTAGE: "; EP
END IF
CLOSE
KILL "D:\SALARY.DAT"
NAME "D:\TEMP.DAT" AS "D:\SALARY.DAT"
END
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