Computer Science Canada

nested for loops
Author:  jinjin [ Sun Mar 16, 2008 5:40 pm ]
Post subject:  nested for loops
Sorry for posting a question again but I keep getting stuck on these dreaded for loops assignments. Please don't regard my lots of question posting as spamming. Thanks.

Anyways, the program I am writing is supposed to ask the user how many times they wish to count from 1 to 20 and then output a 1 to 20 loop repeated by the number of times inputted by the user.

Here's what I have so far:

code:

var times : int
put "How many times do you want to count from 1 to 20?"
get times
for c : 1 .. 20
    for b : 1 .. times
        put c
    end for
end for


The program works perfectly when the number 1 is inputted but when any other number is entered, it counts from 1 to 20 but repeats every number by the input for 'times.' (i.e. for an input of 2, it will output 1 1 2 2 3 3 4 4 ... 20 20). I'm not sure how to configure b or c to fix this. I have tried many different combinations but all have either errors or totally messed up outputs. Any help is appreciated. Thanks Very Happy
Author:  Sean [ Sun Mar 16, 2008 5:51 pm ]
Post subject:  Re: nested for loops
Check the order of the loops, it's doing it twentie times, then putting it depending on the number you input.

Re-organize.
Author:  A.J [ Sun Mar 16, 2008 6:28 pm ]
Post subject:  Re: nested for loops
what vilament is trying to say is that if the person inputs 2, you output each number from 1-20 twice, and so on...
you got the ordering of the for loops mixed up, since you want to output the numbers from 1-20 'times' number of times.
so you make a simple for loop for the counting from 1-20:
Turing:

for i:1..20
   put i
end for

but you should have a bigger for loop around this one to tell the computer that you want to out put the numbers that many times:
Turing:

for j:1..times
   for i:1..20
      put i
   end for
end for

don't get used to me coming to the rescue Wink
Author:  Sean [ Sun Mar 16, 2008 6:34 pm ]
Post subject:  Re: nested for loops
I was hoping for them to do A.J.

They could of solved it.
Author:  A.J [ Sun Mar 16, 2008 6:40 pm ]
Post subject:  Re: nested for loops
well...
you may never know (i wont help people like this next time Very Happy)
Author:  jinjin [ Sun Mar 16, 2008 6:43 pm ]
Post subject:  Re: nested for loops
@ Vilament : I tried reordering the loops and it didn't work for some reason. I was still looking at it so that's why I did not reply for so long.

@ A.J: Thanks for coming to the rescue again, you are a lifesaver Very Happy

@ Vilament : I appreciate your advice equally. I too try working it out myself before looking to the forum.

@ A.J: Sorry for the rescue thing again, I'll try keeping this to a minimum Smile

So, thanks both Vilament and A.J!!! +12 bits to both. This CompSci forum is a great community.
Author:  A.J [ Sun Mar 16, 2008 7:03 pm ]
Post subject:  Re: nested for loops
your welcome Very Happy
feel free to ask for help again, we're not stopping you Very Happy

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