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Thread: Help PLZ .. =(

  1. #1
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    Unhappy Help PLZ .. =(

    Hi All ..

    I need help with this Program .. The question is :

    Use a one-dimensional array to solve the following problem:Write an application that inputs five numbers, each of which is between 10 and 100, inclusive. As each number is read, display it only if it is not a duplicate of a number already read. Provide for the “worst case,” in which all five numbers are different. Use the smallest possible array to solve this problem. Display the complete set of unique values input after the user inputs each new value.

    and this is the code I wrote :

    First Class containing main :

    public class UniqueTest
    {
       public static void main( String[] args )
         {
           Unique obj = new Unique();
           obj.getNumbers();
         } 
    }

    Second Class :

    import java.util.Scanner;
     
    public class Unique
     {
     
         public void getNumbers()
         {
            Scanner input = new Scanner( System.in );
            int [] array = new int [5];
     
            int count = 0; // number of uniques read
            int entered = 0; // number of entered numbers
            int num =0;
     
           while( entered < array.length )
            {
               System.out.print( "Enter number: " );
                num = input.nextInt(); 
     
                if ((num>=10) && ( num<=100))
                 {
                    boolean containsNumber = false;
                    entered++;
     
                     for (int i=0;i<array.length;i++)
                       {
             	 if (array[i]==num)
             	   containsNumber=true;
                       }
     
                     if ( !containsNumber )
                      { 
                         for (int i=0; i<array.length;i++)
                           {
                              array[i]=num;
                              count++;
                           }
     
                       } // end if
     
                     else
                      System.out.printf( "%d has already been entered\n",num );
                   } // end if
     
                    else
              System.out.println( "number must be between 10 and 100" );
     
             //Print the contents of the Array :
              for(int i=0 ; i<array.length;i++)
               {
                System.out.printf("%d\n",array[i]);
                 break;
               }
     
           } // end while
        } // end method getNumbers
     } // end class Unique

    The problem is that when I enter new unique number after the first number ,it will remove the first number and print only the second number .. This is the OutPut :

    Enter number: 11
    11
    Enter number: 27
    27
    Enter number: 80
    80
    Enter number: 100
    100
    Enter number: 60
    60

    and I want the OutPut to be like this :

    Enter number: 11
    11
    Enter number: 27
    11  27
    Enter number: 80
    11  27  80
    Enter number: 100
    11 27  80  100
    Enter number: 60
    11  27  80  100 60

    Any Help is Greatly appreciated ..


  2. #2
    mmm.. coffee JavaPF's Avatar
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    Default Re: Help PLZ .. =(

    Hello Yazan.

    Welcome to the Java Programming Forums

    I have made some changes to your code. The problem was you were filling the entire array with the same num value.

    Take a look at this. I have bolded all the changes.

    import java.util.Scanner;
     
    public class Unique {
     
    	public void getNumbers() {
    		Scanner input = new Scanner(System.in);
    		int[] array = new int[5];
     
    		int count = 0; // number of uniques read
    		int entered = 0; // number of entered numbers
    		int num = 0;
     
    		[B]System.out.println("Enter number: ");[/B]
     
    		while (entered < array.length) {
     
    			num = input.nextInt();
     
    			if ((num >= 10) && (num <= 100)) {
    				boolean containsNumber = false;
    				entered++;
     
    				for (int i = 0; i < array.length; i++) {
    					if (array[i] == num)
    						containsNumber = true;
    				}
     
    				if (!containsNumber) {
     
    					[B]array[count] = num;[/B]
    [B]					//for (int i = 0; i < array.length; i++) {
    					//	array[i] = num;
    						count++;
    					//}[/B]
     
    				} // end if
     
    				else
    					System.out.printf("%d has already been entered\n", num);
    			} // end if
     
    			else
    				System.out.println("number must be between 10 and 100");
     
    			// Print the contents of the Array :
    			for (int i = 0; i < entered; i++) {
     
    	[B]			System.out.print(array[i] + " ");
    				//break;[/B]
     
    			}
     
    			[B]System.out.println("\n" + "Enter number: ");[/B]
     
    		} // end while
    	} // end method getNumbers
    } // end class Unique
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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  3. #3
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    Default Re: Help PLZ .. =(

    Hi JavaPF..

    THX ALOT .. I really appreciate your help ..

    I run the program .. but I faced another Problem :

    The Code after modification :

    import java.util.Scanner;
     
    public class Unique {
     
    public void getNumbers() {
      Scanner input = new Scanner(System.in);
    	int[] array = new int[5];
     
    	int count = 0; // number of uniques read
    	int entered = 0; // number of entered numbers
    	int num = 0;
     
    	while (entered < array.length) 
    		{
    		System.out.println("Enter number: ");
    		num = input.nextInt();
     
    		if ((num >= 10) && (num <= 100)) {
    			boolean containsNumber = false;
    			entered++;
     
    			for (int i = 0; i < array.length; i++) 
    			 {   if (array[i] == num)		
    			     containsNumber = true;
    			 }	
     
    			if (!containsNumber) {
     
    			array[count] = num;
     
    			count++;
     
    			} // end if
     
    			else
     
    			System.out.printf("%d has already been entered\n", num);
     
    	     	      } // end if
     
    		  else
    		   System.out.println("number must be between 10 and 100");
     
    		// Print the contents of the Array :
    		for (int i =0;  i< entered; i++) {
     
    		System.out.print(array[i] + " ");
    		}
     
                                      System.out.println();
    	} // end while
                } // end method getNumbers
    } // end class Unique

    The OutPut is :
    Enter number: 
    30
    30 
    Enter number: 
    40
    30 40 
    Enter number: 
    30
    30 has already been entered
    30 40 0 
    Enter number: 
    50
    30 40 50 0 
    Enter number: 
    20
    30 40 50 20 0

    The Problem is value (0) .. How can I prevent it .. ??

    The OutPut Should be :
    Enter number: 
    30
    30 
    Enter number: 
    40
    30 40 
    Enter number: 
    30
    30 has already been entered
    30 40  
    Enter number: 
    50
    30 40 50  
    Enter number: 
    20
    30 40 50 20


    Please tell me if you know the answer ..

  4. #4
    mmm.. coffee JavaPF's Avatar
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    Default Re: Help PLZ .. =(

    No problem

    Try changing:

    int[] array = new int[5];

    to

    int[] array = new int[4];
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  5. #5

    Default Re: Help PLZ .. =(

    I think it'd be easier for you to add the numbers to string
    String thing += num + " "
    and then parse it
    int ln = 0;
    for(int i=0;i<thing.length()) {
     if(this.substring(i,i) == " ") {
      System.out.printIn(this.substring(ln,i-1)
      ln = i+1;
     }
    }
    . But that's just my opinion. Everybody has their own.

    EDIT: Oops. Sorry. You had to do it an Array.

  6. #6
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    Question Re: Help PLZ .. =(

    I'm a newbie but I think I figured it out:
    public class DuplicateEliminator {
     
       public void getNums(){
            Scanner input=new Scanner(System.in);
    	int[]digits=new int[4];
            int count=0;
    	int entered=0;
    	int num;
     
            while (entered<digits.length) {
                System.out.print("Enter a number between 10 and 100: \n");
    	    num = input.nextInt();
    		if ((num>=10)&&(num<=100)) {
                        boolean isDup=false;
                        entered++;
     
                        for (int i=0;i<digits.length;i++) {
                                if (digits[i]==num)
    			     isDup=true;
                                 entered--;//do not add duplicate digits to array
                                 }
     
                                if (!isDup) {
                                    digits[count]=num;
    			        count++;
                                  	}
                   else
                        System.out.printf("%d is a duplicate number\n", num);
     
                   for(int i=0;i<count;i++) {
                        System.out.printf(digits[i] + " ");
                        }
    	}
          }
        }
     }