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/**
	A class that creates a histogram from data passed as arguments on the command line.
*/
public class Histogram
{
	/**
		Contains the main method.
		@param args used for command-line arguments
	*/
	public static void main(String[] args)
	{
		int total;                           // The total number of values entered at the command line.
		int[] ranges = new int[10];          // Constructs an array of 10 integer numbers.
		int[] values = new int[args.length]; // Constructs an array of integer numbers (with the same length as the args array).
		
		// Parse each of the String objects and determine the integer values that were passed on the command line.
		for (int i = 0; i < args.length; i++)
			values[i] = Integer.parseInt(args[i]);
		
		// Determines how many values there are in each specified range.
		for (int i = 0; i < values.length; i++)
		{
			if (values[i] >= 1 && values[i] <= 10)
				ranges[0]++;
			if (values[i] >= 11 && values[i] <= 20)
				ranges[1]++;
			if (values[i] >= 21 && values[i] <= 30)
				ranges[2]++;
			if (values[i] >= 31 && values[i] <= 40)
				ranges[3]++;
			if (values[i] >= 41 && values[i] <= 50)
				ranges[4]++;
			if (values[i] >= 51 && values[i] <= 60)
				ranges[5]++;
			if (values[i] >= 61 && values[i] <= 70)
				ranges[6]++;
			if (values[i] >= 71 && values[i] <= 80)
				ranges[7]++;
			if (values[i] >= 81 && values[i] <= 90)
				ranges[8]++;
			if (values[i] >= 91 && values[i] <= 100)
				ranges[9]++;
		}
		
		// Prints to the screen a chart that prints an asterisk for each value entered that falls within a specified range.
		System.out.print("\n1  - 10  | ");
		for (int i = 0; i < ranges[0]; i++)
			System.out.print("*");
		System.out.print("\n11 - 20  | ");
		for (int i = 0; i < ranges[1]; i++)
			System.out.print("*");
		System.out.print("\n21 - 30  | ");
		for (int i = 0; i < ranges[2]; i++)
			System.out.print("*");
		System.out.print("\n31 - 40  | ");
		for (int i = 0; i < ranges[3]; i++)
			System.out.print("*");
		System.out.print("\n41 - 50  | ");
		for (int i = 0; i < ranges[4]; i++)
			System.out.print("*");
		System.out.print("\n51 - 60  | ");
		for (int i = 0; i < ranges[5]; i++)
			System.out.print("*");
		System.out.print("\n61 - 70  | ");
		for (int i = 0; i < ranges[6]; i++)
			System.out.print("*");
		System.out.print("\n71 - 80  | ");
		for (int i = 0; i < ranges[7]; i++)
			System.out.print("*");
		System.out.print("\n81 - 90  | ");
		for (int i = 0; i < ranges[8]; i++)
			System.out.print("*");
		System.out.print("\n91 - 100 | ");
		for (int i = 0; i < ranges[9]; i++)
			System.out.print("*");
		
		// Calculates the total number of values entered at the command line.
		total = ranges[0] + ranges[1] + ranges[2] + ranges[3] + ranges[4] + ranges[5] + ranges[6] + ranges[7] + ranges[8] + ranges[9];
		
		// Prints to the screen the total number of values entered at the command line.
		System.out.println("\n\nThe total number of values entered at the command line was: " + total);
	}
}