Question

for java

Welcome to a classic homework problem! Create a public class called Last8. You should exposed two public methods: add: adds a value, does not return a value last: returns an array containing the last 8 values that were added, in any order. You do not need a constructor, but you can add an empty one if you need. Until 8 values have been added you should return 0s in their place. For example, here's how an instance of Last8 should work:

Answer 1

Program :

import java.util.Scanner; 
public class Main
{
    public static void add(int[] a,int x,int i)
    {
        a[i]=x;
    }
    public static int[] last(int[] a)
    {
        int NewArray[] = new int[8];
        int c=0,k=0;
        int j=0;
        while(a[k]!='\0')
        {
            c++;
            k=k+1;
        }
        if(c>=8){
        int l=c-8;
        for(int i=c-1;i>=l;i--)
            {
                NewArray[j]=a[i];
                j=j+1;
            }
        }
        else{
        for(int i=7;i>=0;i--)
            {
                NewArray[j]=a[i];
                j=j+1;
            }
        }
        return NewArray;
    }
        public static void main(String[] args) {
            int Array[] = new int[100];
            add(Array,1,0);
            add(Array,2,1);
            add(Array,3,2);
            add(Array,4,3);
            int[] res=last(Array);
            for(int i=0;i<8;i++)
            {
                System.out.print(res[i] +" ");
            }
        }
}

Output :

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