What does this C snippet output?

1#include <stdio.h>
2int fib(void) {
3    static int a = 0, b = 1;
4    int t = a;
5    a = b;
6    b = t + b;
7    return t;
8}
9int main(void) {
10    for (int i = 0; i < 5; i++)
11        printf("%d ", fib());
12    printf("\n");
13    return 0;
14}