first commit

J04001 - KHAI BÁO LỚP POINT.java

@@ -0,0 +1,25 @@
+import java.util.Scanner;
+public class Main{
+    static class point{
+        double x,y;
+        public void get(Scanner sc){
+            x = sc.nextDouble();
+            y = sc.nextDouble();
+        }
+    }
+    static double dis(point a, point b){
+        return Math.sqrt(Math.pow(a.x-b.x,2) + Math.pow(a.y - b.y, 2));
+    }
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int t = sc.nextInt();
+        while(t-- > 0){
+            point a = new point(); 
+            point b = new point();
+            a.get(sc);
+            b.get(sc);
+            System.out.printf("%.4f\n",dis(a,b));
+        }
+        sc.close();
+    }
+}