Question

Java - Design and implement an application that creates a histogram that allows you to visually inspect the frequency distribution of a set of values. The program should read in an arbitrary number of integers that are in the range 1 to 100 inclusive; then produce a chart similar to the one below that indicates how many input values fell in the range 1 to 10, 11 to 20, and so on. Print one asterisk for each value entered.

Sample Output:

1 - 10 | *****
11 - 20 | *******
21 - 30 | *
31 - 40 | *
41 - 50 | *
51 - 60 | *
61 - 70 | *
71 - 80 | *
81 - 90 | *
91 - 100 | *

Thank you!

Answer 1

import java.util.*;

public class Main
{
   public static void main(String[] args)
   {
   //Scanner
   Scanner input = new Scanner(System.in);
  
   //array declaration
   int values[] = new int[100];
  
   //variable declaration
   int size=0, num;
  
   //while loop
   while(true)
   {
   //get user input
       System.out.print("Enter a number(1:100 and 0 for Exit): ");
   num = input.nextInt();
   if(num<1 || num>100)
   break;
   else
   values[size++] = num;
   }
  
   //display the histogram
   System.out.println("\nThe histogram is given below: ");
   for(int i=1; i<100; i=i+10)
   {
   System.out.print("\n"+i+" - "+(i+9)+" | ");
   for(int j=0; j<size; j++)
   {
   if(values[j]>=i && values[j]<=(i+9))
   System.out.print("*");
   }
   }
   }
}

OUTPUT:

Enter a number(1:100 and 0 for Exit): 5
Enter a number(1:100 and 0 for Exit): 18
Enter a number(1:100 and 0 for Exit): 6
Enter a number(1:100 and 0 for Exit): 13
Enter a number(1:100 and 0 for Exit): 7
Enter a number(1:100 and 0 for Exit): 6
Enter a number(1:100 and 0 for Exit): 9
Enter a number(1:100 and 0 for Exit): 15
Enter a number(1:100 and 0 for Exit): 16
Enter a number(1:100 and 0 for Exit): 18
Enter a number(1:100 and 0 for Exit): 14
Enter a number(1:100 and 0 for Exit): 13
Enter a number(1:100 and 0 for Exit): 56
Enter a number(1:100 and 0 for Exit): 36
Enter a number(1:100 and 0 for Exit): 25
Enter a number(1:100 and 0 for Exit): 45
Enter a number(1:100 and 0 for Exit): 34
Enter a number(1:100 and 0 for Exit): 55
Enter a number(1:100 and 0 for Exit): 66
Enter a number(1:100 and 0 for Exit): 77
Enter a number(1:100 and 0 for Exit): 88
Enter a number(1:100 and 0 for Exit): 99
Enter a number(1:100 and 0 for Exit): 0

The histogram is given below:

1 - 10 | *****
11 - 20 | *******
21 - 30 | *
31 - 40 | **
41 - 50 | *
51 - 60 | **
61 - 70 | *
71 - 80 | *
81 - 90 | *
91 - 100 | *