CLass and Object in C++ -2

Making an  outside function inline:

Functions define inside class are by Default always inline (so they also have benefits and drawback of inline functions ) .

But it is good practice to define member function outside class .

So to define inline function outside class you just have to mention inline in its prototype .

1.         class item{
2.                public:
3.                   void test(void);
4.               }
5. inline void item::test(){
6.          func.. def here ..
7. }          

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

Nesting Of Member Function :-

A Member function can be called by using its name inside another member function of same class.This is known as nesting of member function .

1. // Making an  outside function inline
2. // nesting of member Function
4. #include<iostream>
5. using namespace std;
7. class item{
8.         int a,b,sum;
9.         public:
10.                 void getdata(int x,int y);
11.                 void add(void);
12.                 void print(void){ //Bydefault it is inline as define within class
13.                cout<<" a :- "<<a;
14.                cout<<" b :- "<<b;
15.                cout<<" sum :- "<<sum;
16.         }
17. };
18. inline void item::getdata(int x,int y){  //mention inline in func prototype
19.         a=x;
20.         b=y;
21.         add(); //calling other member fun ,this is called nesting of func
22. }
23. void item::add(void){ //it is not inline
24.   sum=a+b;     
25. }
27. main(){
28.         item x;
29.         x.getdata(5,7);
30.         x.print(); 
31. }

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Output :