program to demonstrate overloading () operator

Author: anishsingh20

Operator Overloading/Overloading()operator.cpp

@@ -0,0 +1,39 @@
+#include<iostream>
+
+using namespace std;
+
+//overloading ()-function call operator
+//one special thing about overloading () operator function is that,only this operator can take default arguments ,no other operator can take default arguments
+
+class Marks {
+	
+		public:
+			int mark;
+			Marks(int m) {
+				mark = m;
+			}
+			
+			
+			//operator function
+			Marks operator () (int m=20) {
+				
+				cout<<"Operator function called"<<endl;
+				mark=m;
+				
+				return *this; //this operator fuction returns the current address of the object
+			}
+			
+	
+};
+
+int main () {
+	
+	Marks m1(90);
+	cout<<m1.mark; //prints 90
+	
+	cout<<"\n";
+	m1(); //operator function called
+	
+	cout<<m1.mark; //now marks is 20
+	return 0;
+}

constructors.cpp

@@ -32,15 +32,32 @@ class human
 
 		}
 
-	private:
+	
 		int age;
 		string name;
 
 
 };
 
+class anish : private human {
+	public:
+		human::age;
+		human::name;
+		anish () {
+			cout<<"Anish constructor called"<<endl;
+		}
+		void intro(int sage,string sname) {
+			age = sage;
+			name = sname;
+			 
+			cout<<"Hello I am "<< " " << sname << " " <<"age is :"<< sage <<endl;
+		}
+};
+
 
 int main() {
-	human *obj= new human;//constructor is called as soon as an object is created
-	obj->introduce();
+//	human *obj= new human;//constructor is called as soon as an object is created
+//	obj->introduce();
+	anish A;
+	A.intro(20,"anish");
 }