lvalue demonstration

lvalue.c

int * foo(void) {
    int a = 4;
    return &a;
}

int main() {
    int a[5];
    a[1] = 3; /* we assign something to the location a[1] */
    printf("%d\n", a[0]); /* and now we read from the (uninitialized) location a[0] */
    *(foo()) = 5; /* and now we assign to the pointer returned by foo */
}