Determine the maximum and minimum distances between 4 points in a 3-space. The u

Question

Determine the maximum and minimum distances between 4 points in a 3-space. The user will be promted to enter any 4 points such as P1(x1,xy1,z1), P2(x2,y2,z2,), P3(x2,y2z3) and P4(x4,y4,z4). Then your program must determine the maximum and minimum between these points and display a message indicatiing for example: max distance is from p1_to_p3 and min distance is from p4_to_p3, etc I went to a tutor we wrote the code together but he did a bad job explaining how the code works to me. Can someone please explain how this code work. Line for line if possible or a general breakdown of it. Thanks a lot! %input should be like this [x1 y1 z1;x2 y2 z2;x3 y3 z3;x4 y4 z4] disp('input should be like this [x1 y1 z1;x2 y2 z2;x3 y3 z3;x4 y4 z4]'); coordinate=input('enter the coordinates matrix:'); distance=zeros(4,4); for i=1:4 for j=1:4 distance(i,j)=sqrt((coordinate(i,1)-coordinate(j,1))^2+(coordinate(i,2)-coordinate(j,2))^2 ... +(coordinate(i,3)-coordinate(j,3))^2); end end mind=intmax; maxd=0; for i=1:4 for j=1:4 if(mind>distance(i,j)&& i~=j) mind=distance(i,j); minx=i; miny=j; end if(maxd maxd=distance(i,j); maxx=i; maxy=j; end end end fprintf('max distance from P%i_to_P%i ',maxx,maxy); fprintf('min distance from P%i_to_P%i',minx,miny);

Explanation / Answer

import java.util.*;
public class Q2 {
   public void main()
   {
       Scanner scanner = new Scanner(System.in);
       double[] p1 = new double[3];
       double[] p2 = new double[3];
       double[] p3 = new double[3];
       double[] p4 = new double[3];
       System.out.print("Enter coordinates of first point");
       p1[0] = scanner.nextDouble();
       p1[1] = scanner.nextDouble();
       p1[2] = scanner.nextDouble();
      
       System.out.print("Enter coordinates of second point");
       p2[0] = scanner.nextDouble();
       p2[1] = scanner.nextDouble();
       p2[2] = scanner.nextDouble();
      
       System.out.print("Enter coordinates of third point");
       p3[0] = scanner.nextDouble();
       p3[1] = scanner.nextDouble();
       p3[2] = scanner.nextDouble();
      
       System.out.print("Enter coordinates of fourth point");
       p4[0] = scanner.nextDouble();
       p4[1] = scanner.nextDouble();
       p4[2] = scanner.nextDouble();
      
       double[] allDist = new double[6];
       allDist[0] = getDist(p1, p2);
       allDist[1] = getDist(p1, p3);
       allDist[2] = getDist(p1, p4);
       allDist[3] = getDist(p2, p3);
       allDist[4] = getDist(p2, p4);
       allDist[5] = getDist(p3, p4);
      
       String[] names = new String[6];
       names[0] = "p1 to p2";
       names[1] = "p1 to p3";
       names[2] = "p1 to p4";
       names[3] = "p2 to p3";
       names[4] = "p2 to p4";
       names[5] = "p3 to p4";
      
       for(int i = 0; i < 6; i++)
       {
           for(int j = 0; j < 5; j++)
           {
               if (allDist[j] > allDist[j+1])
               {
                   double temp = allDist[j];
                   allDist[j] = allDist[j+1];
                   allDist[j+1] = temp;
                   String tem = names[j];
                   names[j] = names[j+1];
                   names[j+1] = tem;
               }
           }
       }
      
       System.out.println("Max distance is between" + names[5]);
       System.out.println("Min distance is between" + names[0]);
          
   }
  
   public double getDist(double[] p1, double[] p2)
   {
       double dist = Math.sqrt(Math.pow(p1[0]-p2[0], 2) + Math.pow(p1[1]-p2[1], 2) + Math.pow(p1[2]-p2[2], 2) );
       return dist;
   }
}

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