point.comC++ Static Members and Functions
- Static member variable is intialized to zero when the object of its class is created. No other initalization is permitted.
- Only one copy of that member is created for entire class.
- It is shared by all the objects of that class.
- It is visible only within the class, but its life time is the entire program.
Member function of a class can also be declared as static. But the static member function can access only static data member.
Syntax:
static data_type variable_name;
Example:
#include<iostream>
using namespace std;
class Rectangle{
static int c;// static member data
public:
void get_data()
{
c++;
}
static int show_data() // static member function
{
return c;
}
};
int Rectangle::c;// initialized to zero
int main(){
Rectangle r1;
Rectangle r2;
r1.get_data();
r2.get_data();
cout << "Final Stage Count: " << Rectangle::show_data() << endl;
return 0;
}
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