Added the code for Default Constructor in C++

Author: pushpakumari5117

OOPs/Constructor/Default_Constructor_cpp.cpp

@@ -0,0 +1,41 @@
+// C++ program to demonstrate Default Constructor
+
+// Default Constructor - A constructor which has no argument is known as Default Constructor. It is invoked
+// at the time of creating object.
+
+// Note : Even if we do not define any constructor explicitly, the compiler will automatically provide a 
+// Default Constructor implicitly.
+
+#include<bits/stdc++.h>
+using namespace std;
+
+// class with Default Constructor defined
+class Person1{
+    public:
+        string name1;
+        int age1;
+        Person1(){
+            name1="abc";
+            age1=10;
+        }
+};
+
+// class with no Default Constructor defined
+class Person2{
+    public:
+        string name2;
+        int age2;
+};
+
+int main(){
+    // Creating an object of class Person1
+    Person1 p1;
+    cout<<"Name1 : "<<p1.name1<<endl;
+    cout<<" Age1 : "<<p1.age1<<endl;
+    
+    // Creating an object of class Person2
+    Person2 p2;
+    cout<<"Name2 : "<<p2.name2<<endl;
+    cout<<" Age2 : "<<p2.age2<<endl;
+    return 0;
+}