Question

Europe South Amaricn 1 125 7.5 625 Central Amenta South Amenca 1 25 h Amenia 2 12.5 dde Eazt

Practice: Two-dimensional arrays

Design an algorithm that takes two locations from the user and outputs the correct points, as shown in the table above. For this problem you only need to output what is on the white lines of the table.

1. You must declare the 2D array and give it a suitable name, but for initialization you can simply write input mySuitablyNamedArray from points table.
2. The user enters the two locations as numbers, for example 0 would refer to Main, US, Alaksa, Canada, 1 would refer to Hawaii, etc.
3. If points are not applicable for a pair of locations, output "NA" to the user. For this part, think of how will you handle the "-" in the table above that means not applicable. What value might best represent this in the 2D array? Recall our Sentinel Value discussion in Week 4.

This is worth 10 points.

Answer 1

import java.util.Scanner;
class Main
{
public static void main(String[] args)
{
int a,b; //variable declaration
double k=0;
Scanner sc=new Scanner(System.in);
//asking the prompt from user
System.out.println("Enter the first point");
a=sc.nextInt();
System.out.println("Enter the second point");
b=sc.nextInt();
double arr[][]={{12.5,22.5,17.5,17.5,17.5,22.5,30,30,40,40,30,40,50,40,50},
{0,7.5,25,25,25,30,40,40,40,40,30,35,60,40,50},
{0,0,-1,17.5,17.5,25,30,35,50,50,60,50,60,60,50},
{0,0,0,-1,17.5,22.5,35,35,50,50,50,50,50,50,50},
{0,0,0,0,-1,10,22.5,35,50,50,50,50,50,50,50},
{0,0,0,0,0,-1,22.5,50,60,60,57.5,-1,60,60,60},
{0,0,0,0,0,0,12.5,60,60,80,60,60,60,60,60},
{0,0,0,0,0,0,0,15,25,35,50,50,60,23,35},
{0,0,0,0,0,0,0,0,-1,40,40,40,60,22.5,40},
{0,0,0,0,0,0,0,0,0,-1,40,35,60,40,40},
{0,0,0,0,0,0,0,0,0,0,15,22.5,35,40,50},
{0,0,0,0,0,0,0,0,0,0,0,22.5,40,40,80},
{0,0,0,0,0,0,0,0,0,0,0,0,22.5,60,60},
{0,0,0,0,0,0,0,0,0,0,0,0,0,-1,-1},
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,-1}};
k=arr[a][b];
if(k==-1) //checking if the value is "-"
System.out.println("NA");
else
System.out.println("The value is "+arr[a][b]);
}
}

OUTPUT

Enter the first point Enter the second point 12 The value is 50.0