Java Programming with arrays

[nuch1311]

import java.util.*;

public class Prj3
{
	static int data[] = new int[20];	
	static Scanner kb = new Scanner(System.in);
    static Random rnd = new Random( 1234 );
    
	
	
	static void Create_array(int arr[], int max)
	{
		int i;

		for (i=0; i<100; i++)
				arr[i] = rnd.nextInt(max);
	}
	
	static void Draw_array(int arr[], int col)
	{
		int i;
    	
    	for (i=0; i<20; i++)
		{
			if (i % col == 0 && i != 0)
				System.out.printf("\n");
				
			System.out.printf("%4d", arr[i]);
		}
	
		System.out.printf("\n\n");
	}
	
	static void New_value()
	{
	}
	
	static void Sort_array(char order)
	{
		int i, j, tmp;
		
		for (i=0; i<100; i++)
		{
			for (j=i+1; j<100; j++)
			{
				if (order == 'D' || order == 'd')
				{
					if ( data[i] < data[j])
					{
						tmp = data[i];
						data[i] = data[j];
						data[j] = tmp;
					}
				}
				
				if (order == 'A' || order == 'a')
				{
					if ( data[i] > data[j])
					{
						tmp = data[i];
						data[i] = data[j];
						data[j] = tmp;
					}
				}
				
				
			}
		}		
	}
	
	
	public static void main(String[] args)
	{
		Scanner kb = new Scanner(System.in);
    	int a;
    	String str;
    	boolean bl=true;
    	int data[] = new int[20];
    	
    	
		while (bl)
    	{
    	
	    	System.out.printf("\n1. Create a random array");
	    	System.out.printf("\n2. Draw array");
	      	System.out.printf("\n3. Enter new values");	
	     	System.out.printf("\n4. Sort the array"); 	
			System.out.printf("\n5. Exit");
	    	
	    	System.out.printf("\n\nPlease make a Selection: ");
	    	a = kb.nextInt();
	    	
	    	//Draw a menu and get a valid choice
			switch (a)
	    	{
	    		case 1: System.out.printf("\n\nCreates a random array\n");
	    				
	    				Create_array(data, 20);
						Draw_array(data, 10);
	    				
	    				break;
	    		
	    		case 2: System.out.printf("\n\nDraw an array\n");
	    				break;
	    		
	    		case 3: System.out.printf("\n\nEnter new values\n");
	    				break;
	    		
	    		case 4: System.out.printf("\n\nSort the array\n");
	    				break;
	    		
	    		case 5: System.out.printf("\n\nExit\n");
	    				bl = false;
	    				break;
	    				
	    		default: System.out.printf("\n\nInvalid");		
	    	}
	    }	
	}
}

[Ezzaral]

Please use code tags around your code to preserve formatting, and.... what is the question?

[nuch1311]

i have to make a code that will create, draw, ask the user to add new values, and sort the array by making a menu to help choose which part to do.

[Ezzaral]

Ok, so again, what is your question?

[nuch1311]

Ok, so again, what is your question?

how to get the program to run, bc i dont know how to make it prints the array and i dont know how to add new values into the array?

[eranga262154]

how to get the program to run

If you don't know how to run the program it is better to do some tutorials before doing this, I think. Isn't it?