From d7e9c9d31ac400f9946ee4532d99077bedc4fd10 Mon Sep 17 00:00:00 2001
From: Krish Patel <patel.12102325@lpu.in>
Date: Mon, 13 Feb 2023 20:04:06 +0530
Subject: [PATCH] Create 21.1 Basic Class and constructer.java

---
 21.1 Basic Class and constructer.java | 73 +++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 21.1 Basic Class and constructer.java

diff --git a/21.1 Basic Class and constructer.java b/21.1 Basic Class and constructer.java
new file mode 100644
index 0000000..8f82854
--- /dev/null
+++ b/21.1 Basic Class and constructer.java	
@@ -0,0 +1,73 @@
+/*
+Write a program to make "Circle" class consisting of following: -- radius --> of double datatype -- parameterized constructor to initialize radius variable -- getArea() --> returns area of Circle of double datatype (formula: 3.14 * radius * radius)
+
+Create array of "n" Circle objects (where "n" is no. of objects specified by user at run-time) and display the area of those Circle-objects whose area is greater than 30.0.
+
+Input Format
+
+Program should take the inputs in following sequence: 1) In First input line, no. of circle objects to create. i.e. value of "n". 2) In remaining input lines, enter radius value of "n" Circle objects. For example, if no. of Circle-objects to be created are 2, then user-inputs should be as follows: 2 3.2 2.5
+
+Constraints
+
+1) No. of Circle objects range between 1 to 10, i.e. 1 <= n <= 10 2) All radius value should be positive, i.e. 0.1 <= radius <= 50.0
+
+Output Format
+
+If no. of Circle-objects "n" is less than 1, then "Invalid input" should be displayed and no other input should be taken. Treat any negative value of radius as 0.0 and then display area of all those circle objects with value greater than 30.0, such as follows: 32.1536
+
+Sample Input 0
+
+2
+3.2
+2.5
+Sample Output 0
+
+32.1536
+*/
+
+
+import java.util.*;
+
+class Circle
+{
+    double radius = 0.0;
+    Circle(double r)
+    {
+        this.radius = r;
+    }
+    double getArea()
+    {
+        return (3.14*this.radius*this.radius);
+    }
+}
+
+
+public class Solution {
+
+    public static void main(String[] args) {
+        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();
+        if(n>=1 && n<=10)
+        {
+            Circle []c = new Circle[n];
+            for(int i=0;i<n;i++)
+            {
+                double r = sc.nextDouble();
+                if(r<=0.1 || r>=50.0)
+                    r = 0.0;
+                c[i] = new Circle(r);
+            }
+            for(int i=0;i<n;i++)
+            {
+                if(c[i].getArea()>30.0){
+                    System.out.println(c[i].getArea());
+                }
+            }
+        }
+        else
+        {
+            System.out.print("Invalid input");
+        }
+    }
+}