QBASIC's Solved Problems I

REM PROGRAM TO CHECK ENTERED NUMBER IS UPPERCASE OR LOWERCASE
CLS
INPUT “Enter a letter”;A$
U$=UCASE$(A$)
IF U$=A$ THEN
PRINT “It is capital letter”

ELSE
PRINT “It is small letter”
ENDIF
END

USING DECLARE FUNCTION PROCEDURE
DECLARE FUNCTION UC$ (A$)
CLS
INPUT “Enter a letter”; A$
PRINT UC$(A$)
END
FUNCTION UC$ (A$)
CH$ = UCASE$(A$)
IF A$ = CH$ THEN
UC$ = “It is capital letter”
ELSE
UC$ = “It is small letter”
END IF
END FUNCTION

USING DECLARE SUB PROCEDURE
DECLARE SUB UC(A$)
CLS
INPUT “Enter a letter”; A$
CALL UC(A$)
END
SUB UC(A$)
CH$ = UCASE$(A$)
IF A$ = CH$ THEN
PRINT “It is capital letter”
ELSE
PRINT “It is small letter”
END IF
END SUB

Program to check a given number is palindrome or not in qbasic
CLS
INPUT “ENTER A NUMBER”; N
S = N
WHILE N <> 0
A = N MOD 10
R = R * 10 + A
N = FIX(N / 10)
WEND
IF S = R THEN
PRINT “THE GIVEN NUMBER IS PALINDROME”
ELSE
PRINT “IT IS NOT PALINDROME”
END IF

Using Declare Sub Procedure
DECLARE SUB A (N)
CLS
INPUT “ENTER A NUMBER”; N
CALL A(N)
END
SUB A (N)
S = N
WHILE N <> 0
B = N MOD 10
R = R * 10 + B
N = FIX(N / 10)
WEND
IF S = R THEN
PRINT “IT IS PALINDROME”
ELSE
PRINT “IT IS NOT PALINDROME”
END IF
END SUB

Program to check a given string is palindrome or not in qbasic
CLS
INPUT “ENTER A STRING”; S$
FOR I = LEN(S$) TO 1 STEP -1
M$ = MID$(S$, I, 1)
REV$ = REV$ + M$
NEXT I
IF S$ = REV$ THEN
PRINT “THE GIVEN STRING IS PALINDROME”
ELSE
PRINT “IT IS NOT PALINDROME”
END IF

Using declare sub
DECLARE SUB A(S$)
CLS
INPUT “ENTER A STRING”; S$
CALL A(S$)
END
SUB A(S$)
FOR I = LEN(S$) TO 1 STEP -1
M$ = MID$(S$, I, 1)
REV$ = REV$ + M$
NEXT I
IF S$ = REV$ THEN
PRINT “THE GIVEN STRING IS PALINDROME”
ELSE
PRINT “IT IS NOT PALINDROME”
END IF
END SUB

Program to check given number is armstrong or not in qbasic
CLS
INPUT “ENTER A NUMBER”; N
S = N
WHILE N <> 0
A = N MOD 10
R = R + A ^ 3
N = FIX(N / 10)
WEND
IF S = R THEN
PRINT “THE GIVEN NUMBER IS ARMSTRONG”
ELSE
PRINT “IT IS NOT ARMSTRONG”
END IF

Using declare sub procedure
DECLARE SUB A(N)
CLS
INPUT “ENTER A NUMBER”; N
CALL A(N)
END
SUB A(N)
S=N
WHILE N <> 0
B = N MOD 10
R = R + B ^ 3
N = FIX(N / 10)
WEND
IF S = R THEN
PRINT “THE GIVEN NUMBER IS ARMSTRONG”
ELSE
PRINT “IT IS NOT ARMSTRONG”
END IF
END SUB

Program to reverse a given number in qbasic
CLS
INPUT “ENTER A NUMBER”; N
WHILE N <> 0
A = N MOD 10
R = R * 10 + A
N = FIX(N / 10)
WEND
PRINT R
END

Using declare sub procedure
DECLARE SUB A(N)
CLS
INPUT “ENTER A NUMBER”; N
CALL A(N)
END
SUB A(N)
WHILE N <> 0
B = N MOD 10
R = R * 10 + B
N = FIX(N / 10)
WEND
PRINT R
END SUB
Using declare function procedure
DECLARE FUNCTION A(N)
CLS
INPUT “ENTER A NUMBER”; N
PRINT A(N)
END
FUNCTION A(N)
WHILE N <> 0
B = N MOD 10
R = R * 10 + B
N = FIX(N / 10)
WEND
A=R
END FUNCTION
Program to convert decimal to hexadecimal in qbasic
‘THIS PROGRAM CONVERTS DECIMAL NUMBER INTO HEXADECIMAL
CLS
INPUT “ENTER A DECIMAL VALUE”; N
WHILE N <> 0
K = N MOD 16
IF K = 10 THEN
B$ = “A”
ELSEIF K = 11 THEN
B$ = “B”
ELSEIF K = 12 THEN
B$ = “C”
ELSEIF K = 13 THEN
B$ = “D”
ELSEIF K = 14 THEN
B$ = “E”
ELSEIF K = 15 THEN
B$ = “F”
ELSE
B$ = STR$(K)
END IF
H$ = B$ + H$
N = FIX(N / 16)
WEND
PRINT “HEXADECIMAL VALUE IS “; H$
END
Using declare function procedure
‘THIS PROGRAM CONVERTS DECIMAL NUMBER INTO HEXADECIMAL
DECLARE FUNCTION Z$ (N)
CLS
INPUT “ENTER A DECIMAL VALUE”; N
PRINT “HEXADECIMAL VALUE IS “; Z$(N)
END
FUNCTION Z$ (N)
WHILE N <> 0
K = N MOD 16
IF K = 10 THEN
B$ = “A”
ELSEIF K = 11 THEN
B$ = “B”
ELSEIF K = 12 THEN
B$ = “C”
ELSEIF K = 13 THEN
B$ = “D”
ELSEIF K = 14 THEN
B$ = “E”
ELSEIF K = 15 THEN
B$ = “F”
ELSE
B$ = STR$(K)
END IF
H$ = B$ + H$
N = FIX(N / 16)
WEND
Z$ = H$
END FUNCTION
Using declare sub procedure
‘THIS PROGRAM CONVERTS DECIMAL NUMBER INTO HEXADECIMAL
DECLARE SUB Z (N)
CLS
INPUT “ENTER A DECIMAL VALUE”; N
CALL Z(N)
END
SUB Z (N)
WHILE N <> 0
K = N MOD 16
IF K = 10 THEN
B$ = “A”
ELSEIF K = 11 THEN
B$ = “B”
ELSEIF K = 12 THEN
B$ = “C”
ELSEIF K = 13 THEN
B$ = “D”
ELSEIF K = 14 THEN
B$ = “E”
ELSEIF K = 15 THEN
B$ = “F”
ELSE
B$ = STR$(K)
END IF
H$ = B$ + H$
N = FIX(N / 16)
WEND
PRINT “HEXADECIMAL VALUE IS “; H$
END SUB
Program to convert decimal to octal in qbasic
‘THIS PROGRAM CONVERTS DECIMAL NUMBER TO Octal
CLS
INPUT “ENTER A NUMBER”; N
WHILE N <> 0
A = N MOD 8
B$ = STR$(A)
N = FIX(N / 8)
C$ = B$ + C$
WEND
PRINT “QUAINARY EQUIVALENT IS”; C$
END
Using declare sub procedure
‘THIS PROGRAM CONVERTS DECIMAL NUMBER TO Octal
DECLARE SUB O(N)
CLS
INPUT “ENTER A NUMBER”; N
CALL O(N)
END
SUB O(N)
WHILE N <> 0
A = N MOD 8
B$ = STR$(A)
N = FIX(N / 8)
C$ = B$ + C$
WEND
PRINT “QUAINARY EQUIVALENT IS”; C$
END SUB
Using declare function procedure
‘THIS PROGRAM CONVERTS DECIMAL NUMBER TO Octal
DECLARE FUNCTION O$(N)
CLS
INPUT “ENTER A NUMBER”; N
PRINT “QUAINARY EQUIVALENT IS”; O$(N)
END
FUNCTION O$(N)
WHILE N <> 0
A = N MOD 8
B$ = STR$(A)
N = FIX(N / 8)
C$ = B$ + C$
WEND
O$=C$
END FUNCTION
Program to reverse a given string in qbasic
CLS
INPUT “ENTER A STRING”; S$
FOR I = LEN(S$) TO 1 STEP -1
M$ = MID$(S$, I, 1)
REV$ = REV$ + M$
NEXT I
PRINT REV$
END
Using declare sub procedure
DECLARE SUB A(S$)
CLS
INPUT “ENTER A STRING”; S$
CALL A(S$)
END
SUB A(S$)
FOR I = LEN(S$) TO 1 STEP -1
M$ = MID$(S$, I, 1)
REV$ = REV$ + M$
NEXT I
PRINT REV$
END SUB
Using declare function procedure
DECLARE FUNCTION A$ (S$)
CLS
INPUT “ENTER A STRING”; S$
PRINT A$(S$)
END
FUNCTION A$ (S$)
FOR I = LEN(S$) TO 1 STEP -1
M$ = MID$(S$, I, 1)
REV$ = REV$ + M$
NEXT I
A$ = REV$
END FUNCTION
Program to converts Hexadecimal to Decimal in Qbasic
‘THIS PROGRAM CONVERTS HEXADECIMAL TO DECIMAL
CLS
INPUT “ENTER HEXADECIMAL VALUE”;B$
FOR I=LEN(B$) TO 1 STEP -1
A$=MID$(B$,I,1)
C=VAL(A$)
IF A$=”A” THEN C=10
IF A$=”B” THEN C=11
IF A$=”C” THEN C=12
IF A$=”D” THEN C=13
IF A$=”E” THEN C=14
IF A$=”F” THEN C=15
H=H+C*16^P
P=P+1
NEXT I
PRINT “DECIMAL VALUE IS”;H
END
Using declare function procedure
‘THIS PROGRAM CONVERTS HEXADECIMAL TO DECIMAL
DECLARE FUNCTION Z(B$)
CLS
INPUT “ENTER HEXADECIMAL VALUE”;B$
PRINT “DECIMAL VALUE IS”;Z(B$)
END
FUNCTION Z(B$)
FOR I=LEN(B$) TO 1 STEP -1
A$=MID$(B$,I,1)
C=VAL(A$)
IF A$=”A” THEN C=10
IF A$=”B” THEN C=11
IF A$=”C” THEN C=12
IF A$=”D” THEN C=13
IF A$=”E” THEN C=14
IF A$=”F” THEN C=15
H=H+C*16^P
P=P+1
NEXT I
Z=H
END FUNCTION
Using declare sub procedure
‘THIS PROGRAM CONVERTS HEXADECIMAL TO DECIMAL
DECLARE SUB Z(B$)
CLS
INPUT “ENTER HEXADECIMAL VALUE”;B$
CALL Z(B$)
END
SUB Z(B$)
FOR I=LEN(B$) TO 1 STEP -1
A$=MID$(B$,I,1)
C=VAL(A$)
IF A$=”A” THEN C=10
IF A$=”B” THEN C=11
IF A$=”C” THEN C=12
IF A$=”D” THEN C=13
IF A$=”E” THEN C=14
IF A$=”F” THEN C=15
H=H+C*16^P
P=P+1
NEXT I
PRINT “DECIMAL VALUE IS”;H
END SUB
Program to convert decimal to binary in qbasic
‘THIS PROGRAM CONVERTS DECIMAL NUMBER TO BINARY
CLS
INPUT “ENTER A NUMBER”; N
WHILE N <> 0
A = N MOD 2
B$ = STR$(A)
N = FIX(N / 2)
C$ = B$ + C$
WEND
PRINT “BINARY EQUIVALENT IS”; C$
END
Using declare sub procedure
‘THIS PROGRAM CONVERTS DECIMAL NUMBER TO BINARY
DECLARE SUB A (N)
CLS
INPUT “ENTER A NUMBER”; N
CALL A(N)
END
SUB A (N)
WHILE N <> 0
E = N MOD 2
B$ = STR$(E)
N = FIX(N / 2)
C$ = B$ + C$
WEND
PRINT “BINARY EQUIVALENT IS”; C$
END SUB
Using declare function procedure
‘THIS PROGRAM CONVERTS DECIMAL NUMBER TO BINARY
DECLARE FUNCTION A$ (N)
CLS
INPUT “ENTER A NUMBER”; N
PRINT “BINARY EQUIVALENT IS”; A$(N)
END
FUNCTION A$ (N)
WHILE N <> 0
E = N MOD 2
B$ = STR$(E)
N = FIX(N / 2)
C$ = B$ + C$
WEND
A$=C$
END FUNCTION
Program to convert Binary to Decimal in qbasic
‘THIS PROGRAM CONVERTS BINARY NUMBER TO DECIMAL
CLS
INPUT “ENTER A BINARY NUMBER”; B$
FOR I = LEN(B$) TO 1 STEP -1
A$ = MID$(B$, I, 1)
C = VAL(A$)
M = M + C * 2 ^ P
P = P + 1
NEXT I
PRINT “DECIMAL VALUE IS “; M
END
Using declare sub procedure
‘THIS PROGRAM CONVERTS BINARY NUMBER TO DECIMAL
DECLARE SUB Z(B$)
CLS
INPUT “ENTER A BINARY NUMBER”; B$
CALL Z(B$)
END
SUB Z(B$)
FOR I = LEN(B$) TO 1 STEP -1
A$ = MID$(B$, I, 1)
C = VAL(A$)
M = M + C * 2 ^ P
P = P + 1
NEXT I
PRINT “DECIMAL VALUE IS “; M
END SUB
Using declare function procedure
‘THIS PROGRAM CONVERTS BINARY NUMBER TO DECIMAL
DECLARE FUNCTION Z (B$)
CLS
INPUT “ENTER A BINARY NUMBER”; B$
PRINT “DECIMAL VALUE IS “; Z(B$)
END
FUNCTION Z (B$)
FOR I = LEN(B$) TO 1 STEP -1
A$ = MID$(B$, I, 1)
C = VAL(A$)
M = M + C * 2 ^ P
P = P + 1
NEXT I
Z = M
END FUNCTION
Program to convert Octal to Decimal in Qbasic
‘THIS PROGRAM CONVERTS OCTAL TO DECIMAL
CLS
INPUT “ENTER A OCTAL VALUE”; B$
FOR I = LEN(B$) TO 1 STEP -1
A$ = MID$(B$, I, 1)
C = VAL(A$)
D = D + C * 8 ^ P
P = P + 1
NEXT I
PRINT “DECIMAL VALUE IS”; D
END
Using declare function procedure
‘THIS PROGRAM CONVERTS OCTAL TO DECIMAL
DECLARE FUNCTION Z (B$)
CLS
INPUT “ENTER A OCTAL VALUE”; B$
PRINT “DECIMAL VALUE IS”; Z(B$)
END
FUNCTION Z (B$)
FOR I = LEN(B$) TO 1 STEP -1
A$ = MID$(B$, I, 1)
C = VAL(A$)
D = D + C * 8 ^ P
P = P + 1
NEXT I
Z = D
END FUNCTION
Using declare sub procedure
‘THIS PROGRAM CONVERTS OCTAL TO DECIMAL
DECLARE SUB Z(B$)
CLS
INPUT “ENTER A OCTAL VALUE”; B$
CALL Z(B$)
END
SUB Z(B$)
FOR I = LEN(B$) TO 1 STEP -1
A$ = MID$(B$, I, 1)
C = VAL(A$)
D = D + C * 8 ^ P
P = P + 1
NEXT I
PRINT “DECIMAL VALUE IS”; D
END SUB
Program to find the product of the digits of the given number in Qbasic
CLS
R = 1
INPUT “ENTER A NUMBER”;N
WHILE N<>0
A = N MOD 10
R = R * A
N = FIX ( N / 10 )
WEND
PRINT “PRODUCT OF DIGITS IS”;R
END
Using declare sub procedure
DECLARE SUB C(N)
CLS
INPUT “ENTER A NUMBER”;N
CALL C(N)
END
SUB C(N)
R = 1
WHILE N<>0
A = N MOD 10
R = R * A
N = FIX ( N / 10 )
WEND
PRINT “PRODUCT OF DIGITS IS”;R
END SUB
Using declare function procedure
DECLARE FUNCTION C(N)
CLS
INPUT “ENTER A NUMBER”;N
PRINT “PRODUCT OF DIGITS IS”;C(N)
END
FUNCTION C(N)
R = 1
WHILE N<>0
A = N MOD 10
R = R * A
N = FIX ( N / 10 )
WEND
C = R
END FUNCTION
Program to find the sum of the digits of the given number in Qbasic
CLS
INPUT “ENTER A NUMBER”;N
WHILE N<>0
A = N MOD 10
R = R + A
N = FIX ( N / 10 )
WEND
PRINT “SUM OF DIGITS IS”;R
END