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  1. #1
    kevorski is offline Member
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    Default Randomly Generate Sentences

    Hello everyone.

    First off I would like to say that this website looks great and will come in handy for my Java class.

    So I've been working on this homework the last few days;
    We are creating a mad libs game. Right now I'm stuck on randomly creating a sentence from the user input. I currently have the user input arrays and just need to be able to call them from a method.

    Any help would be awesome, thanks in advance!

    This is what I currently have:

    Java Code:
    import java.util.Random;
    import java.util.Scanner;
    
    public class madLibs
    {
    
    	public static void main(String [] args)
    	{
    		String[]article, noun, verb, preposition, randomlyGeneratedSentence = null;
    		String str = "";
    
    		int n;
    
    		Scanner kb = new Scanner(System.in);
    		
    		article = articleSelection(kb);
    		noun = articleSelection(kb);
    		verb = articleSelection(kb);
    		preposition = articleSelection(kb);
    		
    	
    		n = menu(kb);
    		
    		if(n == 1)
    			System.out.println("Your random sentence is: " + randomlyGeneratedSentence);		
    		else if(n == 2)
    		{
    			System.out.println("The articles are: " + displayAllWords(article));
    			System.out.println("The nouns are: " + displayAllWords(noun));
    			System.out.println("The verbs are: " + displayAllWords(verb));
    			System.out.println("The prepositions are: " + displayAllWords(preposition));
    		}
    
    	
    	}//end main
    	
    	public static int randomSentence(String[] array)
    	{
    		int i;
    		Random r = new Random();
    		int selectedElement = r.nextInt(array.length);
    		
    		return selectedElement;
    
    	
    	}//end randomSentence
    	
    	public static String[] displayAllWords(String[] array)
    	{
    		for(int x=0; x<array.length; x++)
    		{
    			System.out.println(array[x]);
    		}
    		
    		return array;
    		
    	}//end displayAllWords
    	
    	public static String[] articleSelection(Scanner kb)
    	{	
    		String s = "";
    		String[] temp = null;
    
    		do
    		{
    			System.out.println("Please enter your string type (article/noun/verb/preposition): ");
    			s = kb.nextLine();	
    			
    			if(s.equals("article"))
    				{ 
    				String[] tempArray = fillArray(kb);
    				temp = tempArray;
    				}
    			else if(s.equals("noun"))
    				{
    				String[] tempArray = fillArray(kb);
    				temp = tempArray;
    				}
    			else if(s.equals("verb"))
    				{
    				String[] tempArray = fillArray(kb);
    				temp = tempArray;
    				}
    			else if(s.equals("preposition"))
    				{
    				String[] tempArray = fillArray(kb);
    				temp = tempArray;
    				}
    			else
    			{	
    				System.out.println("Please enter a valid string type");
    				s = kb.nextLine();
    			}
    		}while (!s.equals("article") && !s.equals("noun") && !s.equals("verb") && !s.equals("preposition"));
    		
    		return temp;
    		
    		}//end articleSelection
    		
    		public static String[] fillArray(Scanner kb)
    		{
    			int num;
    			String[] temp;
    			
    			System.out.println("How many words would you like to enter?: ");
    			num = kb.nextInt();
    			kb.nextLine();
    				while(num<1)
    				{
    					System.out.println("Please enter a number greater than 0: ");
    					num = kb.nextInt();
    					kb.nextLine();
    				}
    		
    		temp = new String[num];
    		
    		for(int x=0; x<temp.length; x++)
    		{
    			System.out.println("Please enter your word: ");
    			temp[x] = kb.nextLine();
    		}
    				
    		return temp;
    		
    	}//end fillArray
    
    	public static int menu(Scanner kb)
    	{
    		int choice;
    		
    		System.out.println("Welcome to the mad libs game!");
    		System.out.println("1) Randomly generate a sentence");
    		System.out.println("2) Display all words");
    		System.out.println("3) Add a word");
    		System.out.println("4) Delete a word");
    		System.out.println("5) Display all words sorted");
    		System.out.println("6) Exit the program");
    		System.out.println("Please make a selection: ");
    		choice = kb.nextInt();
    		if(choice<1 || choice>6)
    		do
    		{
    			System.out.println("Please enter a valid selection: ");
    			choice = kb.nextInt();
    		}while(choice<1 || choice>6);
    		
    		return choice;
    	
    	}//end menu
    	
    }//end madLibs
    Last edited by Fubarable; 10-27-2010 at 01:15 AM. Reason: Moderator Edit: Code tags added.

  2. #2
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    Quote Originally Posted by kevorski View Post
    Hello everyone.

    First off I would like to say that this website looks great and will come in handy for my Java class.
    And welcome to Java-Forums.org!


    So I've been working on this homework the last few days;
    We are creating a mad libs game. Right now I'm stuck on randomly creating a sentence from the user input. I currently have the user input arrays and just need to be able to call them from a method.

    Any help would be awesome, thanks in advance!

    This is what I currently have:
    You haven't told us what your current question is, and we'll need that if we are going to have any chance of helping you. What specifically are you stuck on? What doesn't work?

    Also, I edited your post above to add code tags so that your code will retain its formatting and thus will be readable -- after all, your goal is to get as many people to read your post and understand your code as possible, right?

    To do this yourself, highlight your pasted code (please be sure that it is already formatted when you paste it into the forum; the code tags don't magically format unformatted code) and then press the code button, and your code will have tags.

    Another way to do this is to manually place the tags into your code by placing the tag [cod&#101;] above your pasted code and the tag [/cod&#101;] below your pasted code like so:

    Java Code:
    [cod&#101;]
      // your code goes here
      // notice how the top and bottom tags are different
    [/cod&#101;]
    Again welcome!

  3. #3
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    Default

    In other words, you state this:
    I'm stuck on randomly creating a sentence from the user input. I currently have the user input arrays and just need to be able to call them from a method.
    But which bit of code above is your code attempt to solve this and how does it not work? Is it causing errors? The more you can tell us, the better we'll be able to figure out what is wrong.

    Luck!

  4. #4
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    I'm stuck on creating a method that will take the arrays(article, verb, noun, preposition) and create a random sentence. I have started the method randomSentence. I'm stuck on just getting it working

  5. #5
    Fubarable's Avatar
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    Quote Originally Posted by kevorski View Post
    I'm stuck on creating a method that will take the arrays(article, verb, noun, preposition) and create a random sentence. I have started the method randomSentence. I'm stuck on just getting it working
    Specifics please. "I'm stuck" tells us nothing. What does it currently do? What do you want it to do? Talk to me.

  6. #6
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    i want it to take a random word out of each array and make it into a sentence. currently it just errors out. right now i can create all the arrays needed and sort them but when i try to create the random sentence nothing will happen. at this point in time it won't even compile and i'm not sure what i need to fix in it. i have tried changing some variables around but that isn't working
    Java Code:
    		if(n == 1)
    			System.out.println("Your random sentence is: " + randomlyGeneratedSentence);		
    		else if(n == 2)
    		{
    			System.out.println("The articles are: " + displayAllWords(article));
    			System.out.println("The nouns are: " + displayAllWords(noun));
    			System.out.println("The verbs are: " + displayAllWords(verb));
    			System.out.println("The prepositions are: " + displayAllWords(preposition));
    		}
    
    	
    	}//end main
    	
    	public static int randomSentence(String[] array)
    	{
    		int i;
    		Random r = new Random();
    		int selectedElement = r.nextInt(array.length);
    		
    		return selectedElement;
    
    	
    	}//end randomSentence
    i don't have one variable defined atm and that is the randomlyGeneratedSentence variable

  7. #7
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    Quote Originally Posted by kevorski View Post
    i want it to take a random word out of each array and make it into a sentence. currently it just errors out. right now i can create all the arrays needed and sort them but when i try to create the random sentence nothing will happen. at this point in time it won't even compile and i'm not sure what i need to fix in it.
    If your problem is one of a compiler error, then post the error itself and let us know which line of code causes it, and we can help you figure out what's wrong and perhaps how to fix it.

  8. #8
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    madLibs.java:37: '.class' expected is the error i get and i'm using jgrasp

  9. #9
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    Quote Originally Posted by kevorski View Post
    madLibs.java:37: '.class' expected is the error i get and i'm using jgrasp
    Your compiler is saying this? Which line is #37?

  10. #10
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    yes line 37

  11. #11
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    Quote Originally Posted by kevorski View Post
    yes line 37
    Please understand that line 37 means nothing to us since our line numbers don't fully correspond to yours, so your statement above doesn't help us help you. Instead, can you show me the line of code in your program above that is causing the error?

    And please print out the full error message as well.

  12. #12
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    that is the error message that i get

    Java Code:
    madLibs.java:37: '.class' expected
    Java Code:
    String[] randomlyGenerateSentence = randomSentence(article[], noun[], verb[], preposition[])

  13. #13
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    Quote Originally Posted by kevorski View Post
    that is the error message that i get

    Java Code:
    madLibs.java:37: '.class' expected
    Java Code:
    String[] randomlyGenerateSentence = randomSentence(article[], noun[], verb[], preposition[])
    Ah OK. I've not seen a compiler state .class expected, but I can tell you that your line of code isn't valid Java. Your random sentence takes but single String array as a parameter, and you're trying to pass it four array variables. Not only that, the empty square brackets don't belong there as you only use them when declaring an array variable, not when trying to use one. If you want randomSentence to use four arrays, then you'll have to change the method to accept four arrays rather than one.

    To be honest though, I'm still not sure what your code is trying to do. Perhaps it's my fault for not reading it correctly but it seems to be a bit jumbled. You've got a menu method but only call it once and after you've added words, and don't seem call the menu in a loop as one would expect, you've got an array called article[], and I'm not sure what articles are, you call articleSelection for all of your arrays, but then within the body of this method allow the user to enter different parts of speech, so they can enter adjectives when the method has been called to fill a noun array, ...

    I have to ask if you planned out the program first before writing it, and if so, can you describe to us in greater detail what each step is supposed to achieve.

    Luck!
    Last edited by Fubarable; 10-27-2010 at 02:52 AM.

  14. #14
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    so basically here is what is going on....

    Java Code:
    		article = articleSelection(kb);
    		noun = articleSelection(kb);
    		verb = articleSelection(kb);
    		preposition = articleSelection(kb);
    this is where it accesses the articleSelection method, this will allow the user to input the type that they want. it will prompt them to enter either "noun", "verb", "adjective", or "preposition"

    it will then prompt them with how big of an array (or how many words) they want.

    Java Code:
    		public static String[] fillArray(Scanner kb)
    		{
    			int num;
    			String[] temp;
    			
    			System.out.println("How many words would you like to enter?: ");
    			num = kb.nextInt();
    			kb.nextLine();
    				while(num<1)
    				{
    					System.out.println("Please enter a number greater than 0: ");
    					num = kb.nextInt();
    					kb.nextLine();
    				}
    		
    		temp = new String[num];
    		
    		for(int x=0; x<temp.length; x++)
    		{
    			System.out.println("Please enter your word: ");
    			temp[x] = kb.nextLine();
    		}
    				
    		return temp;
    		
    	}//end fillArray
    after they have entered the number it will then ask them to enter the words that they want. which will then store it into the according array; noun, article, verb, etc...


    I was trying to create an array called randomlyGeneratedSentence that will take an element from each of the arrays (noun, verb, adjective, etc..) and store them into it using the randomSentence method.

    after storing that array i wanted to be able to call upon that array to print out the random sentence.

    i'm just working on getting the random sentence working first before i get anything else working....that is probably why it seems like it is jumbled and all over the place. i haven't really had a chance to clean it up yet...just wanting it to work atm.


    does this make a little more sense?

    here is the code that will work properly right now w/o the random sentence
    Java Code:
    import java.util.Random;
    import java.util.Scanner;
    
    public class madLibs
    {
    
    	public static void main(String [] args)
    	{
    		String[]article, noun, verb, preposition, randomlyGeneratedSentence = null;
    		String str = "";
    
    		int n;
    
    		Scanner kb = new Scanner(System.in);
    		
    		article = articleSelection(kb);
    		noun = articleSelection(kb);
    		verb = articleSelection(kb);
    		preposition = articleSelection(kb);
    		
    //		String[] randomlyGenerateSentence = randomSentence(article[], noun[], verb[], preposition[])
    		
    	
    		n = menu(kb);
    		
    		if(n == 1)
    			System.out.println("Your random sentence is: " + randomlyGeneratedSentence);		
    		else if(n == 2)
    		{
    			System.out.println("The articles are: " + displayAllWords(article));
    			System.out.println("The nouns are: " + displayAllWords(noun));
    			System.out.println("The verbs are: " + displayAllWords(verb));
    			System.out.println("The prepositions are: " + displayAllWords(preposition));
    		}
    
    	
    	}//end main
    	
    /*	public static int randomSentence(String[] array)
    	{
    		int i;
    		Random r = new Random();
    		int selectedElement = r.nextInt(array.length);
    		
    		return selectedElement;
    
    	
    	}//end randomSentence
    */	
    
    	public static String[] displayAllWords(String[] array)
    	{
    		for(int x=0; x<array.length; x++)
    		{
    			System.out.println(array[x]);
    		}
    		
    		return array;
    		
    	}//end displayAllWords
    	
    	public static String[] articleSelection(Scanner kb)
    	{	
    		String s = "";
    		String[] temp = null;
    
    		do
    		{
    			System.out.println("Please enter your string type (article/noun/verb/preposition): ");
    			s = kb.nextLine();	
    			
    			if(s.equals("article"))
    				{ 
    				String[] tempArray = fillArray(kb);
    				temp = tempArray;
    				}
    			else if(s.equals("noun"))
    				{
    				String[] tempArray = fillArray(kb);
    				temp = tempArray;
    				}
    			else if(s.equals("verb"))
    				{
    				String[] tempArray = fillArray(kb);
    				temp = tempArray;
    				}
    			else if(s.equals("preposition"))
    				{
    				String[] tempArray = fillArray(kb);
    				temp = tempArray;
    				}
    			else
    			{	
    				System.out.println("Please enter a valid string type");
    				s = kb.nextLine();
    			}
    		}while (!s.equals("article") && !s.equals("noun") && !s.equals("verb") && !s.equals("preposition"));
    		
    		return temp;
    		
    		}//end articleSelection
    		
    		public static String[] fillArray(Scanner kb)
    		{
    			int num;
    			String[] temp;
    			
    			System.out.println("How many words would you like to enter?: ");
    			num = kb.nextInt();
    			kb.nextLine();
    				while(num<1)
    				{
    					System.out.println("Please enter a number greater than 0: ");
    					num = kb.nextInt();
    					kb.nextLine();
    				}
    		
    		temp = new String[num];
    		
    		for(int x=0; x<temp.length; x++)
    		{
    			System.out.println("Please enter your word: ");
    			temp[x] = kb.nextLine();
    		}
    				
    		return temp;
    		
    	}//end fillArray
    
    	public static int menu(Scanner kb)
    	{
    		int choice;
    	
    		System.out.println("Welcome to the mad libs game!");
    		System.out.println("1) Randomly generate a sentence");
    		System.out.println("2) Display all words");
    		System.out.println("3) Add a word");
    		System.out.println("4) Delete a word");
    		System.out.println("5) Display all words sorted");
    		System.out.println("6) Exit the program");
    		System.out.println("Please make a selection: ");
    		choice = kb.nextInt();
    		if(choice<1 || choice>6)
    		do
    		{
    			System.out.println("Please enter a valid selection: ");
    			choice = kb.nextInt();
    		}while(choice<1 || choice>6);
    		
    		return choice;
    	
    	}//end menu
    	
    }//end madLibs
    if you want to compile it and check out what i have accomplished
    Last edited by kevorski; 10-27-2010 at 03:09 AM.

  15. #15
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    Quote Originally Posted by kevorski View Post
    so basically here is what is going on....

    Java Code:
    		article = articleSelection(kb);
    		noun = articleSelection(kb);
    		verb = articleSelection(kb);
    		preposition = articleSelection(kb);
    this is where it accesses the articleSelection method, this will allow the user to input the type that they want. it will prompt them to enter either "noun", "verb", "adjective", or "preposition"

    it will then prompt them with how big of an array (or how many words) they want.

    Java Code:
    		public static String[] fillArray(Scanner kb)
    		{
    			int num;
    			String[] temp;
    			
    			System.out.println("How many words would you like to enter?: ");
    			num = kb.nextInt();
    			kb.nextLine();
    				while(num<1)
    				{
    					System.out.println("Please enter a number greater than 0: ");
    					num = kb.nextInt();
    					kb.nextLine();
    				}
    		
    		temp = new String[num];
    		
    		for(int x=0; x<temp.length; x++)
    		{
    			System.out.println("Please enter your word: ");
    			temp[x] = kb.nextLine();
    		}
    				
    		return temp;
    		
    	}//end fillArray
    after they have entered the number it will then ask them to enter the words that they want. which will then store it into the according array; noun, article, verb, etc...


    That is kind of what confuses me, and again sorry if I'm mis-reading your code, but for instance, say you want to fill the noun array with this line of code:

    Java Code:
    noun = articleSelection(kb);


    It then goes to the articleSelection method as shown here:

    Java Code:
       public static String[] articleSelection(Scanner kb) {
          String s = "";
          String[] temp = null;
    
          do {
             System.out.println("Please enter your string type (article/noun/verb/preposition): ");
             s = kb.nextLine();
    
             if (s.equals("article")) {
                String[] tempArray = fillArray(kb);
                temp = tempArray;
             } else if (s.equals("noun")) {
                String[] tempArray = fillArray(kb);
             //.....

    and as you can see, this method asks the user what type of word he'd like to enter, and then fills an array of String. So while it should be only accepting nouns, the user could say that he wants to enter verbs. In my mind, the method should instead take a String parameter, perhaps called lexicalCatagory and when you call this method to collect nouns, you'd pass the String "noun" into the method, and it would prompt the user to enter nouns, and not ask him what type of words he wants to enter.

    It then repeats the while loop and continues to repeat until the user enters an invalid lexical catagory, and I'm not quite sure why it does this. Why not just do the loop once if they enter a valid lexical catagory?

    Also, how does the user know how many nouns, verbs, etc he wants to enter? Also, what part of speech is an "article"?

  16. #16
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    article as my teacher defines it is:
    the
    a
    some
    many
    etc

    the user will enter how many words it wants to enter in the fillArray method.

    Java Code:
    String[] tempArray = fillArray(kb);
    this stores a temporary array named tempArray as the string array, after that temp will then become what tempArray was and then it will return the array to verb or noun or whatever was chosen.

    basically what is happening in the articleSelection method is it is matching whatever is typed and filling that array.

    now that i'm looking at it, it seems that it will just go in order and no matter what i enter it will be stored as article then noun then verb and so on. how would i store an array named article for actual articles?

    would you like me to post the instructions on my next post?

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    So these are the instructions:

    PROGRAM SPECIFICS
    Write a program that reads a series of strings from the keyboard.
    The strings will be stored in dynamically(No wasted space) allocated arrays. (If you want you can store all the strings in one array but it is harder)
    You must first prompt for the type of string, (article, noun, verb, preposition) and then the number of strings that will be entered.
    Sample input is below
    Please enter the string type: art I am sorry art is not a valid type. Valid types are (article, noun, verb, preposition) Please enter the string type: article
    How many articles: -5 I am sorry you must have at least one article How many articles: 0 I am sorry you must have at least one article How many articles: 5
    Please enter the 5 articles one per line the a one some any
    Please enter the string type: article I am sorry you already entered your articles Please enter the string type: noun
    How many nouns: 3
    Please enter the 3 nouns one per line boy girl dog
    Input would repeat for verbs – here are 4 verbs to use drove jumped walked skipped
    Here are 5 prepositions to use to from over under on
    Once you the strings read in you will need to display a menu with the following choices
    1) Generate a Sentence
    2) Display all words
    3) Add a word
    4) Delete a word
    5) Display all words sorted
    6) Exit the program
     A random sentence is made from noun verb preposition article noun and will be stored in a new allocated array
     The first character in the random string may not be a letter, in which case you don't have to capitalize it. If it is a letter make it uppercase. If it already is an uppercase letter you don't have to do anything.
     There will be at least one of each type .
     The main function will not contain any real processing, just method calls, and a do while or some kind of loop.
     The arrays will be sorted. Meaning the strings are sorted in alphabetical ascending order.
     Appropriate error checking for menu choices is a must.
     You must use string arrays, you can’t use ArrayList or any of those kinds of classes.
    SAMPLE RUN
    Welcome to the Random Sentence Generator (Stu really needs to get a life)
    Please enter the string type: art I am sorry art is not a valid type. Valid types are (article, noun, verb, preposition) Please enter the string type: article
    How many articles: -5 I am sorry you must have at least one article How many articles: 0 I am sorry you must have at least one article How many articles: 5
    Please enter the 5 articles one per line the a one some any
    Please enter the string type: article I am sorry you already entered your articles Please enter the string type: noun
    How many nouns: 3
    Please enter the 3 nouns one per line boy girl dog
    Please enter the string type: verb
    How many verbs: 4
    Please enter the 4 verbs one per line drove jumped walked skipped
    Please enter the string type: preposition
    How many prepositions: 5
    Please enter the 5 prepositions one per line to from over under on
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 1
    Dog jumped over some girl
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 2
    Articles: a any one some the Nouns: boy dog girl Verbs: drove jumped skipped walked Prepositions: from on over to under
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 3
    Add a word to: 1) Articles 2) Nouns 3) Verbs 4) Prepositions Choice --> 3
    What word would you like to add: ran
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 2
    Articles: a any one some the Nouns: boy dog girl Verbs: drove jumped ran skipped walked Prepositions: from on over to under
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 1
    Boy ran to some girl
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 4
    Add a word to: 1) Articles 2) Nouns 3) Verbs 4) Prepositions Choice --> 3
    What word would you like to delete: ran
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 2
    Articles: a any one some the Nouns: boy dog girl Verbs: drove jumped skipped walked Prepositions: from on over to under
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 5
    a any boy dog drove from girl jumped on one over skipped some the to under walked
    Please choose from the following: 1) Generate a Sentence 2) Display all words 3) Add a word 4) Delete a word 5) Display all words sorted 6) Exit the program Choice --> 6
    Have a nice day!:-)


    sorry that it isn't edited it is from a pdf that my teacher sent us

  18. #18
    Fubarable's Avatar
    Fubarable is offline Moderator
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    Quote Originally Posted by kevorski View Post
    article as my teacher defines it is:
    the
    a
    some
    many
    etc
    OK, got it.


    the user will enter how many words it wants to enter in the fillArray method.
    But how will the user know how many to fill?


    Java Code:
    String[] tempArray = fillArray(kb);
    this stores a temporary array named tempArray as the string array, after that temp will then become what tempArray was and then it will return the array to verb or noun or whatever was chosen.

    basically what is happening in the articleSelection method is it is matching whatever is typed and filling that array.

    now that i'm looking at it, it seems that it will just go in order and no matter what i enter it will be stored as article then noun then verb and so on. how would i store an array named article for actual articles?
    Again, you could change the articleSelection method to wordSelection(Scanner kb, String lexicalCatagory), and then prompt the user to enter the type of word specfied by the lexicalCatagory String:
    Java Code:
    System.out.print("Please enter " + lexicalCatagory + " type of words.");

    would you like me to post the instructions on my next post?
    That would probably help. I'm going to go to bed though but likely someone else will take over and help you a bit.

    Much luck and again, welcome!

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    But how will the user know how many to fill?
    they enter in whatever number they want.

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