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Thread: Hi everyone-new here!!!i need some help:]

  1. #1
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    Default Hi everyone-new here!!!i need some help:]

    Hi, i am a beginner in java and i need some help.
    my program should take 2 integers and find their range and output the biggest number(sum of his chars)
    btw i dont have compile error but after i put the integer nothing come out from my methods.
    sorry for my bad english and thanks for any help
    String number1=JOptionPane.showInputDialog(null,"enter first number");
    		int intnum1=Integer.parseInt(number1);
    		String number2=JOptionPane.showInputDialog(null,"enter second number");
    		int intnum2=Integer.parseInt(number2);
    		JOptionPane.showMessageDialog(null,"the sum of the biggest number is"+range(intnum1,intnum2));
    	}
    		public static int range(int num1,int num2) {
    			int l=0;
    			if (num1>num2) {
    			int temp=num2;
    		    num2=num1;
    		    num1=temp;}
    		for (int i=num1;num1<=num2;i++){
    			int sum=0;
    			while (i!=0) {
    				sum+=i%10;
    				i=i/10;
    			}
    			l=m(sum);
     
     
    		}return l;}
    		public static int m(int sum){
    			 int count=0;
    			if (sum>=count) count=sum;
     
    		return count;}

  2. #2
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    Default Re: Hi everyone-new here!!!i need some help:]

    I do not understand what you are trying to do. Please provide sample input and sample output. ie if user enters 5 and 21 what should the output be?
    Improving the world one idiot at a time!

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    Default Re: Hi everyone-new here!!!i need some help:]

    for example if i put 10 and 20.
    it will output 19.since 19 is the biggest number from 10 to 20.
    the sum of his digits i mean

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    Default Re: Hi everyone-new here!!!i need some help:]

    Quote Originally Posted by eyalfish View Post
    the sum of his digits i mean
    Sum of what digits? 19 is simply (20 - 1). I still do not understand the objective.
    Improving the world one idiot at a time!

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    Default Re: Hi everyone-new here!!!i need some help:]

    for example i put 10 and 20.i check the range of the numbers from 10 to 20 include.
    and i need to output the number that his sum of his digits is the highest from all the numbers from 10 to 20.

    --- Update ---

    19 is 9+1=10
    and 10 is the biggest sum of digits from 10 to 20.

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    Default Re: Hi everyone-new here!!!i need some help:]

    Ahh!

    As far as I can see the m method is totally pointless especially when it does not do anything.
    l=m(sum);
    Replace this line with an if statement that compares l and sum to see which value is greater.
    Improving the world one idiot at a time!

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    Default Re: Hi everyone-new here!!!i need some help:]

    it doesnt work for me;/
    but why cant i do this with the m(sum) method.it should work and i dont have compile error
    but something isnt work out.
    thanks anyway

  8. #8
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    Default Re: Hi everyone-new here!!!i need some help:]

    Your m method does not work as it compares each sum to 0 and not the previously highest sum. The other reason it doesn't work is that all sums will be greater than 0 so all it does is pass in a value and then return it. Your l variable will just hold the last sum that was calculated and not the highest.

    Also, user more meaningful variable and method names, l and m provide no details to their purpose.
    Improving the world one idiot at a time!

  9. #9
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    Default Re: Hi everyone-new here!!!i need some help:]

    thanks a lot

    --- Update ---

    i tried what you suggest me to do .and got rid of the m method .but i got red mark under the return count,
    how can i solve it?thanks again

    public static int range(int num1,int num2) {
    			int l=0;
    			if (num1>num2) {
    			int temp=num2;
    		    num2=num1;
    		    num1=temp;}
    		for (int i=num1;num1<=num2;i++){
    			int sum=0;int count=0;
    			while (i!=0) {
    				sum+=i%10;
    				i=i/10;
    			}
    			if (sum>=count) count=sum;
    		}return count;}

  10. #10
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    Default Re: Hi everyone-new here!!!i need some help:]

    Read reply #6 again.
    Improving the world one idiot at a time!