How do you create a calculator on qbasic?

Answer 1

I was able to create a login program in qbasic with this simple code:

cls

1 input "Username: " , username$

if username$ <> "Define what you want your name to be here (use the quotes)" then goto 1

else input "Password: " , password$

if password$ <> "Again define using quotes" then goto 1 else print "You have successfully logged in!"

Hope this helps!

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I would have rewritten the above code...-without using outdated line numbers/being combined together with goto statements-...as being the following...

'*** set username/password...

userName$="abc"

passWord$="123"

'*** get username/password

DO

CLS

PRINT "Log in..."

PRINT

INPUT "Username: ", guessUserName$

INPUT "Password: ", guessPassWord$

LOOP UNTIL guessUserName$=userName$ AND guessPassWord$=passWord$

'*** print welcome screen...

CLS

PRINT TIME$ + " " + DATE$

PRINT

PRINT "Congratulations, "; userName$; ", you have successfully logged in!"

Answer 2

I know that one... I've done it a million times for either practice or my practical tests. I'm a ninth grader. What grade are you?

Anyway, here's how to make a simple calculator. When you make one, be sure to follow this script and put in the cases as done here. I'm showing you how to make one with just two numbers, but you can adjust it later to fit in three, four, or as many numbers as you want.

10 CLS

20 PRINT "Welcome to the QBasic Calculator!"

30 PRINT "Enter two numbers."

40 INPUT nm, nm1

50 PRINT "Choose a basic operation:"

60 PRINT "1. Add 2. Subtract 3. Multiply 4. Divide"

70 INPUT num

80 IF num = 1 THEN 100

90 IF num = 2 THEN 110

91 IF num = 3 THEN 120

92 IF num = 4 THEN 130

100 PRINT "The result is"; nm + nm1

GOTO 140

110 PRINT "The result is"; nm - nm1

GOTO 140

120 PRINT "The result is"; nm * nm1

GOTO 140

130 PRINT "The result is"; nm / nm1

140 PRINT "Hope you enjoyed the math!"

END

That's how you make a simple calculator. (QBasic always makes things simple once you get what it's trying to tell you.) If you want to know how you can do more calculations without exiting the program/output screen, just post another question----and leave the teaching to me!

Ciao for now!

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I would have rewritten the above code...-without using outdated line numbers/together with goto statements-...as being the following, instead...

CLS

PRINT "Welcome to the QBASIC Calculator!"

PRINT "Enter two numbers each separated by a comma: (n,n)"

INPUT num1, num2

PRINT "Choose a basic operation:"

PRINT "MENU: 1> Add 2> Subtract 3> Multiply 4> Divide"

INPUT "Type a menu selection number from 1 to 4"; opNo%

SELECT CASE opNo%

CASE 1: answer = num1 + num2

CASE 2: answer = num1 - num2

CASE 3: answer = num1 * num2

CASE 4: answer = num1 / num2

END SELECT

PRINT "The answer is: "; answer

PRINT "Hope you enjoyed the math!"

END

Answer 3

You can make a program in qbasic very simply. Just you have to learn the commands, their syntax and where to use them. That's all and you can make any qbasic program that you want. For example

a program to print the table of any number:

CLS

INPUT "ENTER ANY NUMBER FOR TABLE" ;TABLE

CLS

FOR ANSWER=TABLE TO (TABLE*10) STEP TABLE

PRINT ANSWER

NEXT

END

Answer 4

CLS

PRINT "PROGRAM: Simple Calculator"

PRINT

INPUT "First number: ", num1%

INPUT "Second number: ", num2%

PRINT

PRINT "Type: 'A', to Add"

PRINT "Type: 'S', to Subtract"

PRINT "Type: 'D', to Divide"

PRINT "Type: 'M', to Multiply"

PRINT

INPUT "Please, enter your letter: ", letter$

PRINT

SELECT CASE letter$

CASE "A": PRINT num1% + num2%

CASE "S": PRINT num1% - num2%

CASE "D": PRINT num1% / num2%

CASE "M": PRINT num1% * num2%

END SELECT

END