Question

In: Computer Science

Create a function that will return true if numbers X and Y exist within S such that X + Y = Z, return false otherwise.

Given:

 

S = [ 2, 1, 3, 4, 7, 5 ]

Z = 8

 

Create a function that will return true if numbers X and Y exist within S such that X + Y = Z, return false otherwise.

 

Code in Java 8. 

Solutions

Expert Solution

Source Code:

import java.util.Scanner;
class ex
{
   static boolean isIn(int arr[],int X)
   {
       int len=arr.length;
       boolean isFound=false;
       for(int i=0;i        {
           if(arr[i]==X)
           {
               isFound=true;
               break;
           }
       }
       return isFound;
   }
   static boolean isThere(int arr[],int X,int Y)
   {
       boolean isExist=false;
       if(isIn(arr,X) && isIn(arr,Y))
       {
           if((X+Y)==8)
               isExist=true;
       }
       return isExist;
   }
   public static void main(String[] args)
   {
       Scanner input=new Scanner(System.in);
       System.out.print("Enter the value for X:");
       int X=input.nextInt();
       System.out.print("Enter the value for Y:");
       int Y=input.nextInt();
       int arr[]=new int[]{2,1,3,4,7,5};
       boolean res=isThere(arr,X,Y);
       if(res==true)
           System.out.println("Yes there Exist.");
       else
           System.out.println("No there does not Exist.");
   }
}

sample input and output:


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