vector_push(v, 32);
vector_push(v, 42);
int a; vector_get(v, 1, a); //a now contains 42
vector_set(v, 0, 0); //v[0] now contains 0
vector_push(v, 32);
vector_push(v, 42);
int a; vector_get(v, 1, a); //a now contains 42
vector_set(v, 0, 0); //v[0] now contains 0