Solved examples of INPUT mode
in File Handling
1. Write a program in QBASIC to open
a sequential data file “WMP.DAT” which contains the name,
address and phone number of employee and display all the records as well as total number of
records stored in the file. (SLC 2064)
OPEN “EMP.DAT” FOR INPUT AS # 1
CLS
P=0
PRINT "Name",
"Address", "Phone"
WHILE NOT EOF(1)
INPUT #1, n$, a$, p$
PRINT n$, a$, p$
P=p+1
WEND
PRINT “Total number of records=”;p
CLOSE #1
END
2.
A data file "MARKS.DAT" contains fields of Roll.no, Name, English,
Nepali and Maths. WAP to print all the contents of the
data file. (SLC supplementary 2065)
OPEN "MARKS.DAT" FOR INPUT
AS #1
CLS
PRINT "Roll no",
"Name", "English", "Nepali", "Maths"
DO WHILE NOT EOF(1)
INPUT #1, r, n$, e, n, m
PRINT r, n$, e,n,m
LOOP
CLOSE #1
END
OPEN "LIB.TXT" FOR INPUT AS
#1
CLS
c=0
PRINT "Books name",
"Authors name", "Price"
DO WHILE NOT EOF(1)
INPUT #1, b$,a$,p
c=c+1
LOOP
PRINT "Total number of
records=";c
CLOSE #1
END
4.
A sequential data file "EMP.DAT" contains name, post and salary
fields of information about employees. WAP to display all the
information of employees along with tax amount. (Tax is 15% of salary)
(SLC 2067)
OPEN "EMP.DAT" FOR INPUT AS
#1
CLS
DO WHILE NOT EOF(1)
INPUT #1, n$, po$, sal
ta = (sal * 15) / 100
PRINT n$, po$, sal, ta
LOOP
CLOSE #1
END
CLS
OPEN "information.dat" FOR
INPUT AS #1
DO WHILE NOT EOF(1)
INPUT #1,n$,a$,p
IF a$="Hasanpur" or
a$="Taranagar" THEN
PRINT "Name=";n$
PRINT "Address=";a$
PRINT "Phone no=";p
ENDIF
LOOP
CLOSE #1
END
6. A data file named
"salary.dat" contains name, designation and salary of employees. WAP
to display all the employees record whose salary is between 10000 to 15000.
CLS
OPEN "salary.dat" FOR INPUT
as #3
DO WHILE NOT EOF(3)
INPUT #3, n$,d$,s
IF s>=10000 and s<=15000 THEN
PRINT "Name="n$
PRINT "Designation=";d$
PRINT "Salary=";s
ENDIF
LOOP
CLOSE #3
END
7. A sequential data file
"result.dat" contains name and marks secured by students in 3
subjects. Assuming that pass marks of each subjects is 40, write a program to
count the number of passed students.
OPEN "result.dat" FOR INPUT
AS #2
DO WHILE NOT EOF(2)
INPUT #2, n$,e,m,c
IF e>=40 and m>=40 and c>=40
THEN
p=p+1
ENDIF
LOOP
CLOSE #2
PRINT "Total number of passed
students=";p
END
8. A sequential data file
“information.dat” contains name, address and phone number of the students. WAP
to enter a telephone number from the keyboard, match the telephone number with
the telephone number stored in the file. If the telephone number matched then
display “Record found” otherwise display “Record not found”
OPEN “information.dat” FOR INPUT AS#1
CLS
INPUT “Enter telephone number=”;tel$
WHILE NOT EOF(1)
INPUT #1, n$, a$, ph$
IF(ph$=tel$) THEN
PRINT “Record found”
ELSE
PRINT “Record not found”
ENDIF
PRINT “Name=”;n$
PRINT “Address=”;a$
PRINT “Telephone number”;ph$
WEND
CLOSE #!
END
OPEN “marks.dat” FOR INPUT AS #1
CLS
PRINT “Name”, “English”, “Maths”,
“Science”, “Nepali”
WHILE NOT EOF(1)
INPUT #1, n$, eng, math, sci, nep
PRINT n$, eng, math, sci, nep
WEND
CLOSE #1
END
10.
A sequential data file called “Marks.dat” contains Roll no, Name, English,
Nepali, and Maths fields. Write a program to print all the contents of the
data file. (SLC 2067 Supp.)
OPEN “marks.dat” FOR INPUT AS #1
CLS
PRINT “Roll no”,“Name”, “English”,
“Maths”, “Science”, “Nepali”
DO WHILE NOT EOF(1)
INPUT #1, r, n$, eng, math, sci, nep
PRINT r, n$, eng, math, sci, nep
LOOP
CLOSE #1
END
11.
WAP to view those records from “employee.dat” sequential data file having
employee’s name, department, appointment data and salary whose salary is more
than Rs 5000. (SLC 2068 Supp.)
OPEN “employee.dat” FOR INPUT AS #2
CLS
WHILE NOT EOF(2)
INPUT #2, n$,d$,a$,s
IF s>=5000 THEN PRINT n$,d$,a$,s
WEND
CLOSE #2
END
OPEN “staff.dat” FOR INPUT AS #1
CLS
PRINT “Name”, “Address”, “Post”,
“Salary”
DO WHILE NOT EOF(1)
INPUT #1, n$,a$,p$,s
PRINT n$,a$,p$,s
LOOP
CLOSE #1
END
13.
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 25000 and less than 40000 (SLC 2071)
OPEN “salary.dat” FOR INPUT AS #1
CLS
DO WHILE NOT EOF(1)
INPUT #1 n$,p$,sa
IF sa>25000 AND sa<40000 THEN
PRINT “Name”;n$
PRINT “Post”;p$
PRINT “Salary”;sa
ENDIF
LOOP
CLOSE #1
END
14.
A sequential data file “record.dat” has records with field name, address, age
and salary. Write a program to display only those records whose age is greater
than 26. (SLC 2070 Supp.)
OPEN "record.dat" FOR INPUT
AS #1
PRINT "Name",
"Address", "Age", "Salary"
DO WHILE NOT EOF(1)
INPUT #1, n$, a$,age, sal
IF age>26 THEN PRINT n$,a$,age,sal
LOOP
CLOSE #1
END
15. A sequential data file
“Employee.rec” consists of numerous records of employees of a company on the
following fields: employee’s name, post, salary and status (i.e. permanent or
temporary) Write a program to read records of the “Employee.rec” file and
display the records of permanent employees whose post is manager.
OPEN “Employee.rec” FOR INPUT AS #1
CLS
WHILE NOT EOF(1)
INPUT #1, N$, P$, S, S$
IF UCASE$(P$)= “MANAGER” AND
UCASE$(S$)= “PERMANENT” THEN PRINT N$, P$, S, S$
WEND
CLOSE #1
END
16. 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 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 search data”; 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
17. A sequential data file
called “Marks.dat” contains NAME, AGE, CITY, and TELEPHONE fields. Write a
program to display all the contents of the data file. (SEE 2072)
OPEN
“Marks.dat” FOR INPUT AS #1
CLS
DO WHILE
NOT EOF(1)
INPUT #1,
N$, A, C$, T#
PRINT N$,
A, C$, T#
LOOP
CLOSE #1
END
18. A sequential
data file called "ADDRESS.DAT" contains NAME, AGE, CITY and TELEPHONE
fields. Write a program to display all the contents of the data file. (SEE 2073
Supp.)
OPEN "ADDRESS.DAT" FOR
INPUT AS #1
DO WHILE NOT EOF(1)
INPUT #1, na$,ag,c$,tel$
PRINT na$,ag,c$,tel$
LOOP
CLOSE #1
END
19. A data file
“STAFF.dat” has stored records of few employees with ID, First name, sur name, post and salary. WAP to display all the records of the
employees whose salary is greater than 40,000.
(SEE 2075)
OPEN “SALARY.dat” FOR INPUT AS #1
CLS
DO WHILE NOT EOF(1)
INPUT #1, ID, Ba$, Ca$, Da$, E
IF E > 40000 THEN PRINT ID, Ba$, Ca$,
Da$, E
LOOP
CLOSE #1
END
20. A sequential data file “Employee.rec” consists of
numerous records of employees of a company on the following fields: employee’s
name, post, salary and status (i.e. permanent or temporary) Write a program to
read records of the “Employee.rec” file and display the records of permanent
employees whose post is manager.
OPEN “Employee.rec” FOR INPUT AS #1
CLS
WHILE NOT EOF(1)
INPUT #1, N$, P$, S, S$
IF UCASE$(P$)= “MANAGER” AND
UCASE$(S$)= “PERMANENT” THEN PRINT N$, P$, S, S$
WEND
CLOSE #1
END
OPEN “paitent.txt” FOR
INPUT AS #1
DO WHILE NOT EOF(1)
INPUT #1, n$,a,g$
IF UCASE$(g$)=”MALE”
THEN PRINT n$,a,g$
LOOP
CLOSE #1
END
22. A data file “result.txt” has the field’s
students name and marks of three subjects. WAP to display all the records along
with percentage whose percentage is greater than 80 and less than 100.
CLS
OPEN “result.dat” FOR INPUT
AS #1
WHILE NOT EOF(1)
INPUT #1, na$,e,m,s
p=(e+m+s)/3
IF p>=80 AND p<100 THEN
PRINT na$,e,m,s,p
WEND
CLOSE #1
END
CLS
OPEN “compu.txt” FOR INPUT AS
#1
OPEN “school.txt” FOR OUTPUT
AS #2
WHILE NOT EOF(1)
INPUT #1, n$,ad$,a
WRITE #2, n$,ad$,a
WEND
CLOSE #1
PRINT “Data are successfully copied”
END
24. WAP to delete the some records from data file
"AVN.DAT" which has contents name, class, roll no and address.
CLS
OPEN "avn.dat" FOR INPUT AS
#1
OPEN "abc.dat" FOR OUTPUT
AS #2
ab:
DO WHILE NOT EOF(1)
INPUT #1, r,n$,c$,a$
PRINT "Name=";n$
PRINT "Class=";c$
PRINT "Roll no=";r
PRINT "Address=";a$
INPUT "Do you want to delete
this record (y/n)";y$
IF y$="Y" or
y$="y" THEN GOTO ab
ELSE
WRITE #2, r, n$, c$, a$
GOTO ab
ENDIF
LOOP
CLOSE #1, #2
KILL "avn.dat"
NAME "abc.dat" AS
"avn.dat"
END
CLS
OPEN “student.dat” FOR INPUT AS#1
OPEN “temp.dat” FOR OUTPUT AS #2
WHILE NOT EOF(1)
INPUT #1, name$, roll, class, date$
PRINT:PRINT
PRINT “Name of the student=”;name$
PRINT “Roll number”;roll
PRINT “Class=”;class
PRINT “Joining date=”;date$
PRINT:PRINT
PRINT “Do you want to Update this
record(Y/N)”
INPUT ch$
IF ch$=”Y” OR ch$=”y” THEN
INPUT “New name=”;name$
INPUT “New roll number=”;roll
INPUT “New class=”;class
INPUT New date=”;date$
ENDIF
WRITE #2, name$, roll, class, date$
WEND
CLOSE #1, #2
KILL “student.dat”
NAME “temp.dat” AS “student.dat”
END
26. A sequential data file “information.dat” contains
name, address and phone number of the students. WAP to enter a telephone number
from the keyboard, match the telephone number with the telephone number stored
in the file. If the telephone number matched then display “Record found”
otherwise display “Record not found”
OPEN “information.dat” FOR INPUT AS#1
CLS
INPUT “Enter telephone number=”;tel$
WHILE NOT EOF(1)
INPUT #1, n$, a$, ph$
IF(ph$=tel$) THEN
PRINT “Record found”
ELSE
PRINT “Record not found”
ENDIF
PRINT “Name=”;n$
PRINT “Address=”;a$
PRINT “Telephone number”;ph$
WEND
CLOSE #!
END
Also Read: Program Design Tools Algorithm Flowchart and Pseudo code
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