Single inheritance in C++

Single inheritance:

• If one base class and one derived class in a program called  “Single inheritance”.

Syntax:

1. class a
   {
             //Base class
   }
   class b: public a
   {
             //Derived class
   }
   Object creation:
   Derived_class_name object_name;
   object_name.function(parameter list);

Example:

1. #include<iostream.h>
   #include<conio.h>
   class emp_data
   {
   public:
   int empno,sal;
   char ename[10];
   void get_data()
   {
   cout<<"\n Enter employee id: ";
   cin>>empno;
   cout<<"\n Enter employee name: ";
   cin>>ename;
   cout<<"\n Enter employee salary: ";
   cin>>sal;
   }
   };
   class emp_sal:public emp_data
   {
   public:
   void salary_increment()
   {
   if (sal<=5000)
   {
   sal=sal+1000;
   cout<<"\n Employee salary has been increased by 1000";
   }
   else if (sal>=5000 && sal<=10000)
   {
   sal=sal+2000;
   cout<<"\n Employee salary has been increased by 2000";
   }
   else
   {
   sal=sal+3000;
   cout<<"\n Employee salary has been increased by 3000";
   }
   }
   void display()
   {
   cout<<"\n \n Employee Details.......";
   cout<<"\n Employee ID : "<<empno;
   cout<<"\n Employee name: "<<ename;
   cout<<"\n Employee sal: "<<sal;
   }
   };
   void main()
   {
   clrscr();
   emp_sal e;
   e.get_data();
   e.salary_increment();
   e.display();
   getch();
   }

Output:

If condition:

Else if condition:

Else condition:

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