Question

Write a java program that will ask the user to enter integers (use loops) until -100 is entered. The program will find and display the greatest, the smallest, the sum and the average of the entered numbers. also write a separate driver class which will be used to run and display the greatest, the smallest, the sum and the average of the entered numbers.

Thanks!!

Answer 1

import java.util.*;
class FindAndDisplay{
    ArrayList<Integer> arr = new ArrayList<Integer>(); //ArrayList to store dynamic values
    public void input(){                              //To take inputs
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        while(n!=-100){                            /*check -100 is entered or not if not then add it to list and enter another the number*/
            arr.add(n);
            n=sc.nextInt();   
        }
    }
    public int sum(){                          //Sum of the numbers
        int s=0;
        for(int i=0;i<arr.size();i++){
            s+=arr.get(i);
        }
        return s;
    }
    public int smallest(){                  //Smallest of numbers
        int minvalue=0;
        for(int i=0;i<arr.size();i++){
            if(i==0){
                minvalue=arr.get(i);
            }
            else{
                if(arr.get(i)<minvalue){
                    minvalue=arr.get(i);
                }
            }
        }
        return minvalue;
    }

    public int greatest(){                     //Greatest of numbers
        int maxvalue=0; 
        for(int i=0;i<arr.size();i++){
            if(i==0){
                maxvalue=arr.get(i);
            }
            else{
                if(arr.get(i)>maxvalue){
                    maxvalue=arr.get(i);
                }
            }
        }
        return maxvalue;
    }

    public double average(){                   //average of numbers
        int s=0;
        for(int i=0;i<arr.size();i++){
           s+=arr.get(i);
        }
        double d1,d2;
        d1=s;
        d2=arr.size();

        return d1/d2;
    }
}
public class driver{
    public static void main(String[] args) {
        FindAndDisplay f=new FindAndDisplay();
        System.out.println("Enter integers ,enter -100 to stop ");
        f.input();
        System.out.println("Results::");
        System.out.println("The Greatest of the numbers: "+f.greatest());
        System.out.println("The Smallest of the numbers: "+f.smallest());
        System.out.println("The Sum of the numbers: "+f.sum());
        System.out.println("The Average of the numbers: "+f.average());
        
    }
}

INPUT&OUTPUT:

Enter integers ,enter -100 to stop
100
400
120
230
254
650
-100
Results::
The Greatest of the numbers: 650
The Smallest of the numbers: 100
The Sum of the numbers: 1754
The Average of the numbers: 292.3333333333333

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