Help Needed - Input / Algebra

[DD Games]

Hello my name is Dale and I am making a simple text game. I am making this game so i can understand more about arrays, math, input from the user, random numbers, etc. In the game you are given a algebra problem such as this 3 + B = 5 then you have to solve for be by typing in the answer which would be 2 and pushing enter. Once you push enter you will either get it right and be awarded 10 points or you lose 5 points by getting it wrong. I dont know how to let the user type in the answer then award the user 10 points if he gets it right or take away 5 points if he gets it wrong. Help is appreciated :)

[kevin]

 First, we'll look at getting input from the user....

Code Select Expand


; tel PB to include the extra Input commands
#include "input"

; This function gets input from the user.. It halts the program until the user hits ENTER
StuffYouTypedin$=StaticInput(">")


; draw what you typed to the screen
print StuffYouTypedin$

;  tell PB to show the screen to the user
Sync

; Now, we'll wait until there's no key existing presses,  because the program is likely to  execute much faster than the person can take their hand off the enter key (from when they typed stuff in)... Which would make the program fall out and end before we can read what we typed..
;  Try removing this line and see what effect it has..
waitnokey

; wait until a key is pressed . 
waitkey



[DD Games]

I understand input from the user, i just need to know how to award the user 10 points if he gets it right or take away 5 points if he gets it wrong.

[kevin]

If what the user inputs is the correct value, then add something to the players score variable..

Code Select Expand


 Score=Score+10



if the input isn't correct, loop back force the user to input another answer

[DD Games]

but what if the user types an incorrect answer how will the program know if its incorrect.

[kevin]

 By plugging the value into an   IF / THEN  or  IF / ENDIF statement...

ie,

Code Select Expand


    if  5=(3 + B )
         print "B is correct"
    else
         print "Nope, B isn't correct"
    endif



[DD Games]

This is what i have so far:
Sorry I dont know how to do a code box thing like you can.

#Include "Input"

Print "Welcome to Algebra 101"
Name$=StaticInput("What is your name? ")
Cls Rgb (0,0,0)
WaitNoKey

Print "Hello" + " " + Name$
Continue$=StaticInput("Press Enter to continue...")
Cls Rgb (0,0,0)

Print "Instructions:"
Print "1. First we will give you a problem to solve"
Print "2. Then you type in your answer and push enter"
Print "3. If you get it right you get 10 points"
Print "4. If you get it wrong you lose 5 points"
Continue$=StaticInput("Press Enter to start the game...")
Cls Rgb (0,0,0)

Score = 0

Print "First Problem:"
Print "1 + A = 3"
Answer$=StaticInput("A = ")
WaitNoKey


Sync
WaitKey

[kevin]

  This sample,  gets the input from the user and plugs it into the math expression.

PlayBASIC Code: [Select]

; tel PB to include the extra Input commands
      #include "input"

   ; repeat this section, until the until expression is true 
      repeat
            
      ; This function gets input from the user.. It halts the program until the user hits ENTER
         StuffYouTypedin$=StaticInput(">")

         ; Does 5 =(2+variable) ? 
         if  5=(2+val(StuffYouTypedIn$))

            ; yes, so say so on the screen
            print StuffYouTypedin$ +" is correct!"

            print "Well done!"

            ; set the variable to exit the REPEAT/UJNTIL
            CorrectAnswerFound=true
      
         else

            ; nope the expression in the IF statement wasn't true, so the stuff
            ; the person typed in was wrong
            print StuffYouTypedin$ +" is way wrong...."
         endif

   ;  tell PB to show the screen to the user
         Sync

   ; loop this section of code, UNTIL the variable CorrectAnswerFound ='s true
      until  CorrectAnswerFound=true



   ;  clear the keyboard buffer
      flushkeys

   ; wait until a key is pressed .  
      waitkey

 
 

[DD Games]

in this game the user has to find out what the letter equals. Example:
1 + A = 5
A = 4

[kevin]

 Which is what above does.

[DD Games]

okay i will give it a try.

[DD Games]

I got it to work :). Thanks alot it works like a champ.