面包店的单子

#include <stdio.h>

struct Item {
    const char *name;
    int price;
    int qty;
};

int item_total(struct Item item) {
    int price = item.price;
    // 在这里写：个数不少于 3，price 就减 1
    return price * item.qty;
}

int main(void) {
    struct Item bagels = {"bagel", 4, 2};
    struct Item muffins = {"muffin", 5, 3};
    printf("%s: %d\n", bagels.name, item_total(bagels));
    printf("%s: %d\n", muffins.name, item_total(muffins));
    return 0;
}