english

english/basic_content/virtual/set1/emp.cpp

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+#include<iostream>
+using namespace std;
+
+
+class Employee 
+{ 
+    public: 
+        virtual void raiseSalary() 
+        {
+            cout<<0<<endl; 
+        }
+
+        virtual void promote() 
+        { /* common promote code */ } 
+}; 
+
+class Manager: public Employee { 
+    virtual void raiseSalary() 
+    {   
+        cout<<100<<endl;    
+    } 
+
+    virtual void promote() 
+    { /* Manager specific promote */ } 
+}; 
+class Engineer: public Employee { 
+    virtual void raiseSalary() 
+    {
+        cout<<200<<endl;    
+    }
+
+    virtual void promote() 
+    { /* Manager specific promote */ } 
+}; 
+
+// Similarly, there may be other types of employees 
+// We need a very simple function to increment salary of all employees 
+// Note that emp[] is an array of pointers and actual pointed objects can 
+// be any type of employees. This function should ideally be in a class  
+// like Organization, we have made it global to keep things simple 
+void globalRaiseSalary(Employee *emp[], int n) 
+{ 
+    for (int i = 0; i < n; i++) 
+        emp[i]->raiseSalary(); // Polymorphic Call: Calls raiseSalary()  
+    // according to the actual object, not  
+    // according to the type of pointer                                  
+} 
+int main(){
+    Employee *emp[]={new Manager(),new Engineer};
+    globalRaiseSalary(emp,2); 
+    return 0;
+}