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Java Forum / General / February 2007Help with an assignment
Alright I'm having a bit of trouble getting started for this assignment in my Java class. I have to create a class that prompts for how many rows are in a triangle and print the output with an equilateral triangle where the top row is centered and comes down as if it was center justified-- and also a triangle as if it were right justified. Thanks in advance for your help. > Alright I'm having a bit of trouble getting started for this > assignment in my Java class. I have to create a class that prompts for > how many rows are in a triangle and print the output with an > equilateral triangle where the top row is centered and comes down as > if it was center justified-- and also a triangle as if it were right > justified. Thanks in advance for your help. I have some general advice on getting started on assignments at http://home.earthlink.net/~patricia_shanahan/beginner.html For tasks like the triangle drawing, it can be helpful to try to do the task yourself, and see what you have to do. Patricia > Thanks in advance for your help. You haven't specified, what your problem is. That way nobody can help you in another way than wishing you luck. Regards, Lothar  SignatureLothar Kimmeringer E-Mail: spamfang@kimmeringer.de PGP-encrypted mails preferred (Key-ID: 0x8BC3CD81) Always remember: The answer is forty-two, there can only be wrong questions! > Alright I'm having a bit of trouble getting started for this > assignment in my Java class. [snip description] Shame that! Did you actually have a question for us? Did you try the exercise? How far did you get? What happened? >> Alright I'm having a bit of trouble getting started for this >> assignment in my Java class. [quoted text clipped - 3 lines] > > Did you try the exercise? How far did you get? What happened? The quoted sentence says "I'm having a bit of trouble getting started" so I assume he did not get very far, and needs advice on how to get started, which I sent in my first response. Patricia >>> Alright I'm having a bit of trouble getting started for this >>> assignment in my Java class. [quoted text clipped - 10 lines] > > Patricia OP - We need more information... For example the number must be 3 or greater. Are you doing any kind of error checking? What are you using for a row element>? "*" or "x" or somthing? Do you have an algorithm for determining how many "*"s you need? I think you will need something to help you figure out how many you need. .. > OP - We need more information... No we don't. Or rather, the best help the OP can get at the moment is the advice (and link) that Patricia has already given. The OP will not get very far with programming, if they come to rely on people who spoon-feed the answers. Andrew T. >>>> Alright I'm having a bit of trouble getting started for this >>>> assignment in my Java class. [quoted text clipped - 11 lines] >> Patricia > OP - We need more information... I don't see that we do. Remember the objective is to help the OP get started, not to do the assignment for him. Patricia > >>>> Alright I'm having a bit of trouble getting started for this > >>>> assignment in my Java class. [quoted text clipped - 16 lines] > > Patricia In no way, was I trying to get anyone to give me the answer.. I really want to learn to program well and was just stuck on this problem.. I've figured out how to make a left justified triangle by prompting for input n and using a for loop where i < n to print out "[]" *(i+1). Now, I'm just unsure how to do it where the triangle is centered and right justified. Any advice? Thank you. > In no way, was I trying to get anyone to give me the answer.. I really > want to learn to program well and was just stuck on this problem.. > I've figured out how to make a left justified triangle by prompting > for input n and using a for loop where i < n to print out "[]" *(i+1). > Now, I'm just unsure how to do it where the triangle is centered and > right justified. Any advice? Thank you. As Patricia suggests frequently, step back from the computer and think about the problem, what it actually means, and what steps you would have to follow using paper and pen[cil] to step through the algorithm. So you have to ask yourself, - What is a "triangle"? You partially answered this in your first draft. - What is "centered"? (Hint: "centered" implies a notion of total width.) - What is "right justified"? - In each case, what would the program output look like? Actually draw a picture. - What out of a computer onto a screen, paper or other output medium would make pictures at least approximately like that? - What are the output commands that would produce such pictures? - What data are needed by these commands in order to get it right? - Lew >>>>>> Alright I'm having a bit of trouble getting started for this >>>>>> assignment in my Java class. [quoted text clipped - 17 lines] > Now, I'm just unsure how to do it where the triangle is centered and > right justified. Any advice? Thank you. Ah, much better... We have a much better idea of how to help people if they say exactly how far they've got, and what problems they might now be having. Now we know you're not just hoping for a readymade solution to be dropped on your lap like some other people are! So, doing a few sketches on paper of the various example would be a good idea, as others have suggested, and Patricia's advice is good. A hint: you might want to be outputting some space characters (' ') before things in order to get visible characters like '[]' to appear more to the right of the screen... lex > >>>>>> Alright I'm having a bit of trouble getting started for this > >>>>>> assignment in my Java class. [quoted text clipped - 32 lines] > > lex I think I've figured out how to do the right justified one, but I'm still pretty stumped by the center justified one. I could do the same for loop that I did with the other one but add a " " * n -- > I think I've figured out how to do the right justified one, but I'm > still pretty stumped by the center justified one. I could do the same > for loop that I did with the other one but add a " " * n -- How far into a line is its center? - Lew > > I think I've figured out how to do the right justified one, but I'm > > still pretty stumped by the center justified one. I could do the same [quoted text clipped - 3 lines] > > - Lew Depends on how many rows the user inputs.. >>> I think I've figured out how to do the right justified one, but I'm >>> still pretty stumped by the center justified one. I could do the same >>> for loop that I did with the other one but add a " " * n -- Lew wrote: >> How far into a line is its center? > Depends on how many rows the user inputs.. Isn't a row the same thing as a line? My question has to do with each separate line of output. For example, let us say you had a line like this (not part of a triangle): ^blah.didi.rightHere!!thereItIs.blaa.ahha.$ where '^' represents the beginning of the line and is not meant to represent a literal character, and likewise '$' represents the end of line, not a literal character. Where is the center of that line? What if it had spaces in it instead of some of the other characters? What if it had spaces in it in lieu of any other character? - Lew >>> I think I've figured out how to do the right justified one, but I'm >>> still pretty stumped by the center justified one. I could do the same [quoted text clipped - 4 lines] > > Depends on how many rows the user inputs.. Hint: Ignoring "characters" for now, how would you normally find the midpoint of a line? Isn't the midpoint the same as it's "center?" >>>>> Alright I'm having a bit of trouble getting started for this >>>>> assignment in my Java class. [quoted text clipped - 17 lines] > > Patricia Which is exactly what *I* was trying to do. And since there's no way I could possibly code a solution to the problem without asking for / looking for help, I tried to supply a starting point. >>> Alright I'm having a bit of trouble getting started for this >>> assignment in my Java class. [quoted text clipped - 7 lines] > so I assume he did not get very far, and needs advice on how to get > started, which I sent in my first response. Fair enough. It just looked like another hopeful "maybe if I post my homework question someone will just write the solution for me" type of post. > >>> Alright I'm having a bit of trouble getting started for this > >>> assignment in my Java class. [quoted text clipped - 10 lines] > Fair enough. It just looked like another hopeful "maybe if I post my > homework question someone will just write the solution for me" type of post. I think I've figured out how to do the right justified one, but I'm still pretty stumped by the center justified one. I could do the same for loop that I did with the other one but add a " " * n -- Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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