What is the static variable?

Answer 1

A static variable is a variable that is common to every call of the function, for example :
int f(){
static int count=0;
return ++count;
}

int main(){
std::cout<<f()<<std::endl;
std::cout<<f()<<std::endl;
return 0;
}

the result will be
1
2

Answer 2

thanks broo.

Answer 3

your welcome :)