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Thread: Combing println with for loop

  1. #1
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    Default Combing println with for loop

    Hello,
    I am having trouble combing my println statements with a for loop that prints out stars.

    What my program does is read in a file with temperature data on it from different cites. It will increase the counters in an array if they are in a certain range. I have to count how many days it hits that certain range of temperatures and create a star histogram for each range.

    for example - this data file for denver shows how many days are given for the specified ranges

    Yearly temperature data for Denver
    <= 9 ( 3):
    10 - 19 ( 4):
    20 - 29 ( 9):
    30 - 39 ( 27):
    40 - 49 ( 47):
    50 - 59 ( 66):
    60 - 69 ( 62):
    70 - 79 ( 44):
    80 - 89 ( 66):
    90 - 99 ( 37):
    >=100 ( 0):

    so 3 days were less than 9 degress, 66 days were in the 50's and so forth. I have to construct a star histogram next to these so it can be displayed as a graph. I am able to create the starts according to the array but can't line them up...

    ***
    ****
    *********
    ***************************
    ***********************************************
    ************************************************** ****************
    ************************************************** ************
    ********************************************
    ************************************************** ****************
    *************************************


    so the output that i have looks like this so far
    /////////////////////////////////////////////////////////////////////
    Yearly temperature data for Denver
    <= 9 ( 3):
    10 - 19 ( 4):
    20 - 29 ( 9):
    30 - 39 ( 27):
    40 - 49 ( 47):
    50 - 59 ( 66):
    60 - 69 ( 62):
    70 - 79 ( 44):
    80 - 89 ( 66):
    90 - 99 ( 37):
    >=100 ( 0):
    ***
    ****
    *********
    ***************************
    ***********************************************
    ************************************************** ****************
    ************************************************** ************
    ********************************************
    ************************************************** ****************
    *************************************
    //////////////////////////////////////////////////////////////////////////////////////////////////////





    i am trying to make it look like this:

    Yearly temperature data for Denver
    <= 9 ( 3):***
    10 - 19 ( 4):****
    20 - 29 ( 9):*********
    30 - 39 ( 27):***************************
    40 - 49 ( 47):********************************************** *
    50 - 59 ( 66):********************************************** ********************
    60 - 69 ( 62):********************************************** ****************
    70 - 79 ( 44):********************************************
    80 - 89 ( 66):********************************************** ********************
    90 - 99 ( 37):*************************************
    >=100 ( 0):






    here is my code


    import java.io.File;
    import java.io.FileNotFoundException;
    import java.util.*;
     
    public class Temperature
    {
     
     
     
    	public static void main(String [] args)
    	{
    		//ask the user what city they want to see the temps for
    		//System.out.println("Enter in the City: ");
    		//Scanner city = new Scanner(System.in);
     
     
    		String filename = args[0];
    		Scanner inputStream = null;
     
    		int numfile = args.length;
    		System.out.println(numfile);
     
    		//tells you how many files are in the arguments tab and prints out their names
    		for(int i = 0; i<numfile;i++)
    		{
    			System.out.println(args[i]);
    		}
     
     
    		try
    		{
     
    			inputStream = new Scanner(new File(filename));
    		}
     
    		//
    		catch(FileNotFoundException e)
    		{
    			if(numfile == 0)
    			{
    				System.out.println("Error: User did not specify a file name.");
    			}
    			else 
    			{
    			System.out.println("Error: " + filename + " does not exist.");
    			System.exit(0);
    			}
    			//e.printStackTrace();
    		}
     
     
     
     
     
     
     
    		int [] temps = new int[11];
    		//scans the file for a number
    		while(inputStream.hasNextInt())
    		{
     
     
    			//print the numbers of the document on the screen. if no other numbers the loop ends
    			int num = inputStream.nextInt();
    			System.out.println(num);
     
    			//calculates where the number falls in the range, increase its index every time is finds an occurence of it
    			if(num <= 9 )
    			{
    				temps[0]++;
    			}
     
     
    			if(num>=10 && num<=19)
    			{
    				temps[1]++;
    			}
     
     
    			if(num>=20 && num<=29)
    			{
    				temps[2]++;
    			}
     
     
    			if(num>=30 && num<=39)
     
    			{
    				temps[3]++;
    			}
     
     
    			if(num>=40 && num<=49)
    			{
    				temps[4]++;
    			}
     
     
    			if(num>=50 && num<=59)
    			{
    				temps[5]++;
    			}
     
     
    			if(num>=60 && num<=69)
    			{
    				temps[6]++;
    			}
     
     
    			if(num>=70 && num<=79)
    			{
    				temps[7]++;
    			}
     
     
    			if(num>=80 && num<=89)
    			{
    				temps[8]++;
    			}
     
     
    			if(num>=90 && num<=99)
    			{
    				temps[9]++;
    			}
     
     
    			if(num>=100)
    			{
    				temps[10]++;
    			}
     
     
     
     
    		}
     
     
     
     
     
    		System.out.println("end!!!!!!!!!!!!");
     
     
     
     
     
    		System.out.println("Yearly temperature data for " + args[0]); //change this to a counter
    		System.out.println("   <= 9 (   " + temps[0] + "):");
    		System.out.println("10 - 19 (   " + temps[1] + "):");
    		System.out.println("20 - 29 (   " + temps[2] + "):");
    		System.out.println("30 - 39 (   " + temps[3] + "):");
    		System.out.println("40 - 49 (   " + temps[4] + "):");
    		System.out.println("50 - 59 (   " + temps[5] + "):");
    		System.out.println("60 - 69 (   " + temps[6] + "):");
    		System.out.println("70 - 79 (   " + temps[7] + "):");
    		System.out.println("80 - 89 (   " + temps[8] + "):");
    		System.out.println("90 - 99 (   " + temps[9] + "):");
    		System.out.println("  >=100 (   " + temps[10] + "):");
     
     
     
     
    		for(int i = 0;i<temps[i];i++){
     
    			for (int j = 0; j<temps[i];j++)
    			{
    				System.out.print("*");
    			}
    			System.out.println("");
    		}
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
    	}
    }

    Any advice or help would be greatly appreciated! Thank you!
    Last edited by norske_lab; March 25th, 2012 at 12:40 PM. Reason: show stars


  2. #2
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    Default Re: Combing println with for loop

    Hello norske_lab!
    If i were you i would make a method that prints the stars (i would change a little bit the for loops...) and call that method after every System.out.println(). There may be a better and simpler way though.
    Hope it helps.

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