Computer Science Canada If command help! |
| Author: | Cheburashka [ Tue Apr 21, 2009 7:22 pm ] |
| Post subject: | If command help! |
I am supposed to let the computer select one number between 50 and 100. The user gets three guesses to get it right. If they guess correctly before the third guess the program exits he loop and displays a message this is what i have so far however it doesnt work %Declaration Section var guess, guess2, guess3, answer : int var tries : int := 0 %Program Title procedure title (programTitle : string) cls locate (1, 33) put "Guessing Game" put " " end title proc pauseProgram var reply : string (1) put " " put "Press any key to continue..." getch (reply) end pauseProgram %Program introduction procedure introduction title (" ") locate (3, 1) put "See if you can guess a number between fifty and one hundred!" end introduction %Random number proc randNum title (" ") randint (answer, 50, 100) put "The number from 50 to 100 is: ", answer end randNum %User Input procedure userInput var reply : string (1) locate (5, 1) put "Enter a number between 50 and 100: " .. get guess tries := tries + 1 for x : 1 .. 100 if guess > 100 then put "Error the number should be between 50 and 100, enter again: " get guess elsif guess < 50 then put "Error the number should be between 50 and 100, enter again: " get guess end if end for if guess < answer then put "Too low, try again: " .. get guess2 elsif guess > answer then put "Way up there? try again" get guess2 else put "Congratulations you guessed the number!" end if end userInput %Processing&Output proc display %Possible guess results-you must add the if structure! end display proc goodBye locate (20, 20) put "Program by:Sabina Rafikova" end goodBye %Main Program pauseProgram randNum introduction loop userInput display exit when tries = 3 or guess = answer end loop goodBye %End Program My question is how do i make the 3 tries without using the if command over and over, i know that I am supposed to use var tries, and then put tries:=tries=1, however I dont get how it works |
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| Author: | Tony [ Tue Apr 21, 2009 8:02 pm ] | ||
| Post subject: | RE:If command help! | ||
use proper variable names. In
what does x stand for? |
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| Author: | Dusk Eagle [ Tue Apr 21, 2009 9:37 pm ] | ||
| Post subject: | Re: If command help! | ||
Tony, I think you're being a little harsh in your example. It is generally acceptable to name your "for loop variables" as a single letter of the alphabet; teachers even teach it this way. This is commonly done with i rather than x, but does it really matter? Cheburashka, highlight your code by sticking it in between a [syntax="turing"] and a [/syntax]. Now, onto your program. What is the for loop supposed to do in this chunk of code anyway?
There is no need to pester the user 100 times about this issue. In fact, the only reason the user doesn't get pestered 100 times seems to lie in a quirk with Turing, where global variables can not be "get"ted more than once in a procedure without being skipped over. Speaking of global variables, you should really try to avoid using them whenever possible. One thing I think will help you cut down on the number of global variables is something called a function, which is almost exactly like a procedure, so there's no need to worry. Go read about them here. |
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| Author: | Tony [ Tue Apr 21, 2009 9:45 pm ] |
| Post subject: | Re: If command help! |
I was going to lead towards the Dusk Eagle @ Tue Apr 21, 2009 9:37 pm wrote: What is the for loop supposed to do...?
question. It seems that you are pointing at the same snippet of code anyway. |
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| Author: | Cheburashka [ Tue Apr 21, 2009 9:47 pm ] |
| Post subject: | Re: If command help! |
Tony @ Tue Apr 21, 2009 9:45 pm wrote: I was going to lead towards the
Dusk Eagle @ Tue Apr 21, 2009 9:37 pm wrote: What is the for loop supposed to do...?
question. It seems that you are pointing at the same snippet of code anyway. The for loop makes the error repeat so that if the user makes an error twse he will get the error message if i dont use the for loop it only shows the error once |
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| Author: | Dusk Eagle [ Tue Apr 21, 2009 9:53 pm ] | ||
| Post subject: | Re: If command help! | ||
Replace that for loop with the one below and see what happens.
Notice how it keeps hitting the break statement without waiting for the user input (assuming guess < 50 or >100)? This is clearly not what you want. Besides, why only continue 100 times? Why not continue forever until a condition is met? BTW, I was wrong about that quirk in Turing. I realize what the problem was now. |
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