constructors in cpp

Author: anishsingh20

OOP-2.cpp

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+#include<iostream>
+
+using namespace std;
+
+class human{
+	
+	public:
+	
+	string name;
+	void introduce();
+	
+	
+};
+
+
+//scope resolution operator-used to define the class methods outside the class
+void human :: introduce() 
+{
+	cout<<"Hello"<<" " <<human :: name <<endl;
+}
+
+
+int main ()
+{
+	human obj1;
+	obj1.name="Anish";
+	obj1.introduce();
+
+	human *obj2 = new human; //pointer method of creating an dynamic object stored in HEAP section of memory
+	obj2->name="Mrinal";
+	obj2->introduce();
+	cout<<obj2; //displays the address of memory in heap	
+	
+	return 0;
+}

constructors.cpp

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+//constructors example
+#include<iostream>
+
+using namespace std;
+
+
+class human 
+{
+	public:
+		human() {
+			int age=10;
+			string name="Anish";
+			cout<<"Constructor is called"<<endl;
+		}
+		
+		void introduce()
+		 {
+		 	cout<<"Hello I am" <<" " << getName() << " "<<"and my age is" << getage()<<endl;
+		 }
+		 
+		int getage() 
+		{
+		 cin>>age;
+		 return age;
+			
+		}
+		string getName() 
+		{
+			
+			cin>>name;
+			return name;
+			
+		}
+		
+	private:
+		int age;
+		string name;
+	
+	
+};
+
+
+int main() {
+	human *obj= new human;//constructor is called as soon as an object is created
+	obj->introduce();
+}