import java.io.*;
import java.util.*;
public class Prog02
{
   public static void main(String[] args) throws IOException {
      //Declare variables
      final double MIN = 10, MAX = 1000;
      double range, calcMin = 102, calcMax = -2, calcMean = 0.0, fileInput = 0.0, sum = 0.0;
      int mean = 0;
      double stdev;
      char choice;
      String userInput;
      int n, randNums = 0;

      Scanner kb = new Scanner(System.in);
      Random rgen = new Random();

      System.out.println("Prog02 will generate n normally distributed values.");
      System.out.println("User will give n (10 <= n <= 1000), the target mean and standard deviation.");
      System.out.println("Prog02 will then:");
      System.out.println("\t1 - Generate the n numbers");
      System.out.println("\t2 - Draw a bar chart");
      System.out.println("\t3 - Calculate and display min, max, range, mean, and standard deviation");
      System.out.println("\t4 - Ask if you want to repeat the process");

         do {
            System.out.print("How many random numbers do you want (10..1000): ");
            n = kb.nextInt();
            while ( n < MIN || n > MAX) {
               System.out.println("ERROR: Number must be between 10 and 1000 inclusive.");
               System.out.print("How many random numbers do you want (10..1000): ");
               n = kb.nextInt();
            }
         System.out.print("What mean do you want: ");
         mean = kb.nextInt();
         System.out.print("What standard deviation: ");
         stdev = kb.nextInt();

         System.out.println("Bar Chart for the normally distributed integers in file");
         for (int i = 0; i <= n; i++) {
            randNums = (int)(rgen.nextGaussian() * stdev + mean);
            System.out.println(randNums + ":");
            if (calcMax < randNums)
               calcMax = randNums;
            if (calcMin < randNums)
               calcMin = randNums;
         }
         range = (calcMax - calcMin) + 1;
         sum = sum + randNums;
         System.out.printf("\nMeasures for the uniformly distributed integers in file, Nums" + n + ".txt");
         System.out.printf("\nMin: %.2f", calcMin);
         System.out.printf("\nMax: %.2f", calcMax);
         System.out.printf("\nRange: %.2f", range);
         System.out.print("\nWant to generate another list of numbers? (y or n) ");
         userInput = kb.next();
         choice = userInput.charAt(0);
      }
      while (Character.toUpperCase(choice) == 'Y');
         if (Character.toUpperCase(choice) != 'Y');
            System.out.println("Prog02 terminating . . .");
   }
}