Fib implemented with the static keyword in C++

static-fib.cpp

#include <iostream>
using namespace std;

void fib(){
    static int a = 0;
    static int b = 1;
    static int c;
    cout << a << endl;

    c = a;
    a = b;
    b = b + c;
}

int main() {
    for (int i = 0; i<10; i++)
        fib();

    return 0;
}