Someone

int main(int argc, char **argv) {    tree t;    int i, r = 0,    for (i = 0; i < argc; i++) {        if (strcmp("-r", argv[i]) == 0) {           r = i;        }    }    if (r != 0) {       t = tree_new(RBT);    } else {       t = tree_new(BST);    }    tree_delete(t);    return EXIT_SUCCESS;}