Static Keyword. (Doubt)

[rajatsreenath]

I Dont Understand this code.

code:-
#include<iostream>
using namespace std;
class sample
{
static int c; //declaring static c initialised to zero
//before first object created
public:
sample()
{
c++; //increment static variable
}
int getcount()
{
return c;
}
static int d; //public static
};
int sample::c=0; //definition of c
int sample::d; //definition of d


Questions:-
1. Should static variable always be created outside the access specifier?
2. What will happen if i declare the variable inside public?
3. Where all do we have to use the static funtion?
4. Should it be only static variables for static funtions?

[TheIdeasMan]

1. Should static variable always be created outside the access specifier?

That just means that it is private. if it had been a struct instead of a class, it would be public. That is the only difference between class and struct.

2. What will happen if i declare the variable inside public?

It's usually a bad idea to have public or protected variables.

3. Where all do we have to use the static funtion?

https://www.tutorialspoint.com/cplusplus/cpp_static_members.htm

4. Yes.

[helios]

4. It's less "should" and more "must". If you try to access a non-static member from a static member the compiler will reject the program (unless you do it via an instance of the class). Non-static members can use static members, however.