title: Finding the Closest Pair of Points Using basic functions
body: <p>I'm tryin' to find the closest pair of points, but my code just won't work. I'm not expert in this field, please help me out. This is for my project T_T</p>
  
  <p>my code goes like this:</p>
  
  <pre><code>import java.util.Scanner;
  public class FindingClosestPair {
      public static void main(String[] args) {
          Scanner input = new Scanner(System.in);
  
          System.out.print("Enter the number of points: ");
          int nPoints = input.nextInt();
  
          System.out.print("Enter "+nPoints+" points: ");
          float [][] points = new float [nPoints][2];
          for(int r=0; r&lt;points.length; r++){
              for(int c=0; c&lt;points[0].length; c++){
                  points[r][c] = input.nextFloat(); 
              }
          }
  
          for(int r=0; r&lt;points.length; r++){
              for(float e : points[r]){
                  System.out.print(e+" ");
              }
              System.out.println();
          }
  
          float p1=0, p2=0, shortestDistance=0, d1=0, d2=0, d=0;
          float x1=0, x2 = 0, x3=0, y1=0, y2 = 0, y3=0;
          float a1=0, a2=0, b1=0, b2=0;
  
          for(int r1=0; r1&lt;points.length-2; r1++){
              x1 = points[r1][0];
              y1 = points[r1][1];
              for(int r2=r1+1; r2&lt;points.length-1; r2++){
                  x2 = points[r2][0];
                  y2 = points[r2][1];
                  d1 = (float) Math.sqrt((Math.pow(x2-x1, 2))+(Math.pow(y2-y1, 2)));
                  for(int r3=r2+1; r3&lt;points.length; r3++){
                      x3 = points[r3][0];
                      y3 = points[r3][1];
                      d2 = (float) Math.sqrt((Math.pow(x3-x1, 2))+(Math.pow(y3-y1, 2)));
                      if(d1&lt;d2){
                          d=d1;
                          a1=x1; b1=y1;
                          a2=x2; b2=y2;
                      }else if(d2&lt;d1){
                          d=d2;
                          a1=x1; b1=y1;
                          a2=x3; b2=y3;
                      }
                  }
              }
          }
  
          System.out.println("The closest two points are ("+a1+","+b1+") and ("+a2+","+b2+")");
      }
  }
  </code></pre>
  
  <p>So there. I'm pretty bad, right? T_T</p>