Clobber i by overflowing s

clobber.c

#include <stdio.h>

struct foo {
    char s[4];
    int i;
};

int main() {
    struct foo f;
    f.i = 10;
    printf("Enter a string: ");
    scanf("%s", f.s);
    printf("i: %d\n", f.i);
    return 0;
}