CLass and Object in C++ -3

                                            

Private member Function :-

Although it is normal practice to place all the data in a private section and all the function in public section .But some situation may require certain function to be hidden (like private data) fro outside calls. 

So we can make a function private . this private function can't be call directly using . operator .

It can only be called by another function that is a member function of that class.

The array can be used as member variable in class .   

Realted Post : CLass and Object in C++ -2

Related post : CLass and Object in C++ -1

1. // Private member Function
2. //array within class
4. #include<iostream>
5. using namespace std;
7. class sum_array{
8.         private:
9.                 int ar[5]; //array can be used as member variable
10.                 void print_sum(void); //private member function
11.         public:
12.                 void getdata(void);
13.                
14. };
15. void sum_array::getdata(){
16.         cout<<" Input 5 element to sum ";
17.         for(int i=0;i<5;i++){
18.                 cin>>ar[i];
19.         }
20.         print_sum();
21. }
22. void sum_array::print_sum(){
23.         int sum=0;
24.         for(int i=0;i<5;i++){
25.                 sum=sum+ar[i];
26.         }
27.         cout<<" Sum :- "<<sum;
28. }
29. main(){
30.         sum_array x;
31.         x.getdata();
32.         // x.print_sum() ->> you can't access this using . operator as private
33. }

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