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New To Java


for loops and min and max values


I am writing a program that takes a group of numbers input from the keyboard and outputting them with tags to show which is largest and which is smallest.  I have an idea of how this is supposed to work.  Could any one give me help on how to make a for loop work with this?? I cannot get mine to work at all.  I keep getting this really weird number every time I try to run the program.  Thanks!!

Please post your code using [code] and [/code] tags.  Post the incorrect results as well.

Hint :- Populate the input numbers into an appropriate collections class and then 'sort' them .. thus you get an ordered list on which you further attach tags while showing the output.  Cheers - JiNN

        int max;         int min;         int input;         int input2;         int input3;          max = Integer.MIN_VALUE;         min = Integer.MAX_VALUE;           Scanner keyboard = new Scanner(System.in);            System.out.println("Enter 3 numbers.");  input = keyboard.nextInt(); input2 = keyboard.nextInt(); input3 = keyboard.nextInt();  if (input < min)         input = min; else if (input2 < min) input2 = min; else if (input3 < min) input3 = min; else     min = 0;   if (input > max)     input = max; else if (input2 > max)     input2 = max; else if (input3 > max)     input3 = max; else     max = 0;  System.out.println("The current min number is: " + min); System.out.println("The current max number is: " + max);  This is what I had.  It doesn't work.  I don't understand how for loops are supposed to work.  I read about them but I still don't understand them.

Ok, let me rephrase that:  Please post your code using [code] and[/code] tags (see: http://forum.java.sun.com/help.jspa?sec=formatting).  Post the incorrect results as well.

This might also be of help: http://java.sun.com/docs/books/tutorial/java/nutsandbolts/for.html

 int max; int min; int input; int input2; int input3;   max = Integer.MIN_VALUE; min = Integer.MAX_VALUE;   Scanner keyboard = new Scanner(System.in);     System.out.println("Enter 3 numbers.");   input = keyboard.nextInt(); input2 = keyboard.nextInt(); input3 = keyboard.nextInt();   if (input < min) input = min; else if (input2 < min) input2 = min; else if (input3 < min) input3 = min; else min = 0;     if (input > max) input = max; else if (input2 > max) input2 = max; else if (input3 > max) input3 = max; else max = 0;   System.out.println("The current min number is: " + min); System.out.println("The current max number is: " + max); 

There should be sequence of   if statements  like this          if (input < min){             min = input;         }                  if (input2 < min){             min = input2;         }                  if (input3 < min){             min = input3;         }     instead of    if (input < min) input = min; else if (input2 < min) input2 = min; else if (input3 < min) input3 = min; else min = 0;   

You still haven't told what it is that's going wrong! Also check the link I posted in reply #5. After reading that, do you understand the for-statement? Try the code example's from there, and implement it in your code.

You still haven't told what it is that's going wrong!  The wrong was that min variable was not assigned.  Also check the link I posted in reply #5. After reading that, do you understand the for-statement? Try the code example's from there, and implement it in your code.  Is it appropriate implementation of  for-statement?          int NumCount = 3;                  for( int i = 0; i < NumCount; i++ ){             int input = keyboard.nextInt();                          if (input < min){                 min = input;             }         }            

When I run the code that I just gave you, this is the results that I am getting:  The current min number is: 2147483647 The current max number is: -2147483648  I have no idea where those numbers are coming from!!!!  NO COMPRENDE!!

You still haven't told what it is that's going wrong!  The wrong was that min variable was not assigned.  No, I meant the OP didn't tell what it is that's going wrong. ; )

I will try to read the page you gave me and more in my text book to see if I can understand how this is supposed to work.  I am still not getting it but thanks for the help...

> The current min number is: 2147483647 The current max number is: -2147483648  I have no idea where those numbers are coming from!!!!    Those are the initial values: Integer.MAX_VALUE and Integer.MIN_VALUE  > NO COMPRENDE!!  Read raindrop's last reply, there's an example how to use the for-statement and how to check an input number.

I will try to read the page you gave me and more in my text book to see if I can understand how this is supposed to work.  I am still not getting it but thanks for the help...  REPLY 9 !!!


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