static variables

[hamshid]

void func1(int i){
static int staticInt = i;
cout << staticInt << endl;
}
int main(){
func1(1);
func1(2);
}
the output is 1
1
but
class Student{
…
public:
static int noOfStudents;
Student();
~Student();
…
};
int Student::noOfStudents = 0;
Student::Student(){
noOfStudents++;
}
Student::~Student(){
noOfStudents--;
}

int Student::noOfStudents = 0;
int main(){
cout <<Student::noOfStudents <<endl;
Student studentA;
cout <<Student::noOfStudents <<endl;
Student studentB;
cout <<Student::noOfStudents <<endl;
}
the output is 0
1
2
why ? in the previous code the value of static variable doesnt change but why does it change in this program ?

[Peter87]

void func1(int i) {
	static int staticInt = i;
	cout << staticInt << endl;
}

The static variable is created and initialized the first time the function is called. Next time the function is called it will reuse the same object, having the same value as last time.

[hamshid]

ohh thanks :)

[Rechard3]

please use code tags:

http://v2.cplusplus.com/articles/jEywvCM9/