Thread: Homework help what am I doing wrong?

Ok, in my Java programming class we have to write a program that reads some integers between 1 and 100 and counts the occurrences of each. Assume the input ends with 0. Here is a sample run of the program:

Enter some integers between 1 and 100: 2 5 6 5 4 3 23 43 2 0
2 occurs 2 times
3 occurs 1 time
4 occurs 1 time
5 occurs 2 times
23 occurs 1 time
43 occurs 1 time

Note that if a number occurs more than one time, the plural word "times" is used in the output. Also,
note that the integers input will be between 1 and 100 but there may be more than 100 numbers input.
Finally, note that for integers input 0 times, nothing is printed.

Ok so here's what I have so far, but the program won't run! If you could be as thorough as possible, I'm a beginner and terrible at programming! Thanks so much!

import java.util.Scanner;
 
class NumberOccurance{
 
 public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
 
               System.out.print("Enter the integers between 1 and 100: ");
 
        int i, count[] = new int[101];
 
        while (input.hasNextInt())
            count[input.nextInt()]++;
 
        for (i=1; i < 101; i++)
            if (count[i] != 0)
                System.out.println(i+" occurs "+count[i]+" time"+(count[i]>1?"s":""));
    }
}

When I debug this in netbeans it allows me to enter the numbers but I get no response what is wrong? What am I missing?

Yes I enter the following numbers to test it 2 5 6 5 4 3 23 43 2 0 and the cursor just moves to the next line and that is it.

--- Update ---

Ok unfortunately I have a teacher that doesn't explain things too well for us can you give an example of where the {} should be. Because I see this alot in netbeans and was just told not to worry about it.

Originally Posted by Norm

Please edit your post and wrap your code with code tags:
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.

Not sure I understand what you mean here please explain.

--- Update ---

Thanks for your help that site will help me learn some more. My teacher is no help.

Ok got it thanks Norm I will do so. Did i do it right?

--- Update ---

This what i get when I enter the numbers

debug:
Enter the integers between 1 and 100: 2 5 6 5 4 3 23 43 2 0
<<<<(The cursor ends up here)

--- Update ---

Norm you still there?

Originally Posted by Norm

The code tags are good. Now it needs the { and }

Where do I put the { AND }? Not sure like I said I am really new at this.

But from what you see here am I headed in the right direction? The code is correct right?

Hey Norm I am going to sign off for now I am watching the nba on espn so I can't quite concentrate be back in a few hours thanks for the help I'll be back later. My wife is headed off to school too so I need to watch our two year old. I'll be back when I can concentrate better. sorry

probably later tonight or tomorrow yes. Thank for your help again friend.

Hey Norm you around? I typed several more numbers in to that code and still got nothing.

--- Update ---

Well I'll check back later today is my 7th wedding aniversary! yeah I lasted 7 years so far! Still in love too!

Norm is there a simpler way of writing this without the hasNextInt involved? evedently that is to advanced for my class and he wants it simpler can you show me how you would do this and explain it to me so I may learn? Remember please keep it simple I really do want to learn this but I have a teacher who will not help and a dead line to turn it it in too. The dead line is May 1st to turn it in can you help?

Originally Posted by Norm

Ask the user how many numbers he is going to enter, and use that value to control how many times the loops goes around. That will require the user to do an accurate count before entering the data
vs entering the data and ending it with a special value.

Is this what you are talking about? Something like this?

import java.util.Scanner;
 
class NumberOccurance{
 
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
 
System.out.print("Enter the integers between 1 and 100: ");
 
for (int i = 0; i <= 101; i++) {
 
int[] count = new int[101];
count[i] = input.nextInt();
count[i]++;
 
while (i != 0) {
 
if (count[i] > 0) {
if (count[i] > 1) (
System.out.println(i + " occurs " + count[i] + " times");
}
else
System.out.println(i + " occurs 1 time");
}
}
}
}
}

--- Update ---

sees to be off still. but it is simpler right?

Originally Posted by Norm

What happens when you compile and execute the code?

When I enter the following test numbers : 2 5 6 5 4 3 23 43 2 0 I get the following repeated over and over.
1 occurs 6 times

--- Update ---

Also according to the assignment we have to write a program that reads some integers between 1 and 100 and counts the occurrences of each. Assume the input ends with 0.

I got It! Like this right?

import java.util.Scanner;
 
class NumberOccurance{
 
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
int[] counts = new int[100];
 
System.out.print("Enter the integers between 1 and 100 and 0 to exit the program: ");
 
 
int number = input.nextInt();
while (number != 0) {
counts[(number - 1)] += 1;
number = input.nextInt();
}
 
for (int i = 1; i < 100; i++)
if (counts[i] > 0)
System.out.println(i + 1 + " occurs " + counts[i] + (
counts[i] == 1 ? " time" : " times"));
}
}

--- Update ---