cpp course

Author: gucci1909

tut18.cpp

@@ -0,0 +1,27 @@
+#include <iostream>
+using namespace std;
+
+int count=1;
+class Employee {
+    public:
+      Employee(){
+        count++;
+        cout << "Constructor called" << endl;
+        cout << count << endl;
+      };
+      ~Employee(){ // <-- Destructor called here
+        count--;
+        cout << "Destructor called" << endl;
+        cout << count << endl;
+      }
+};
+
+int main(){
+    Employee a;
+    {
+        cout << "Entering here" << endl;
+        Employee b, c; // <-- constructor will be called here
+        cout << "Exiting here" << endl;
+    }; // <-- here destructor will be called , because b and c ended here as the object ends
+    return 0;
+}

tut19.cpp

@@ -0,0 +1,53 @@
+#include <iostream>
+using namespace std;
+
+class Employee;
+
+// BASIC INHERITANCE
+
+class Employee
+{
+    int id;
+
+public:
+    int salary;
+    Employee(int v1)
+    {
+        id = v1;
+        salary = 34;
+    }
+    Employee() {}
+    void show(void)
+    {
+        cout << id << endl;
+        cout << "Hello Employee!!" << endl;
+    }
+};
+
+class Programmer : public Employee // <-- private of Employee will never come here and by default every thing comes from Employee as private and to make public of Employee , write public here for Employee
+{
+    int coder;
+
+public:
+    Programmer(int v1)
+    {
+        coder = v1;
+    };
+    void show(void)
+    {
+        cout << coder << endl;
+        cout << "Hello Programmer!!" << endl;
+    }
+};
+
+int main()
+{
+    Employee a(2);
+    a.show();
+
+    Programmer ankit(1);
+    ankit.show();
+    cout << ankit.salary;
+
+    return 0;
+}