Java 小练

发表于 更新于 分类于 本文字数： 2k 阅读时长 ≈ 2 分钟
Java 小练

自动售货机

实现基本的自动售货机的功能，包括商品种类显示，商品价格显示，商品余量显示，找零显示等

Java 代码

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138

package machine;



import java.util.Scanner;



public class VendingMachine {

    int drinkNumber;

    int total = 0;//总共收到的钱

    int amount = 0;//顾客投入的钱

    String[] drink = {"1:苹果汁 ","2:可乐 ","3:牛奶 ","4:橙汁 "," 5:苏打水"};//饮品种类

    int[] price = {5,3,6,4,2};//饮品价格

    int[] quantity = {3,3,3,3,3};//所剩饮品数量

    Scanner in = new Scanner(System.in);

    void showPrompt() {

        System.out.println("欢迎!");

    }



    void initDrink() {

        int i;

        System.out.printf("饮品种类:");

        for ( i=0 ; i<drink.length ; i++) {

            System.out.printf("%s",drink[i]);

        }

        if (i == drink.length) {

            System.out.printf("\n");

        }

    }



    void chooseDrink() {

            System.out.println("请输入要购买饮品序号");

            this.drinkNumber = this.in.nextInt()-1;

    }



    void insertMony() {

        System.out.println("请将纸币插入钞票口");

        this.amount = this.in.nextInt();

    }



    void getDrink() {

        int price;

        price = this.price[drinkNumber];

        if(quantity[drinkNumber]>0) {

            if (amount > price) {

                System.out.printf("找您%d元\n",(amount - price));

                System.out.printf("这是您要的%s，慢走不送\n",drink[drinkNumber]);

                this.total = amount - price + this.total;

                this.quantity[drinkNumber]--;

            }else if(amount == price) {

                System.out.printf("这是您要的%s，慢走不送\n",drink[drinkNumber]);

                this.total += amount;

                this.quantity[drinkNumber]--;

            }else {

                System.out.printf("余额不够，退您%d元",amount);

            }

        }else {

            System.out.println("对不起，商品缺货");

        }



    }

    public static void main(String[] args) {

        VendingMachine m1 = new VendingMachine();

        while(true) {

            m1.showPrompt();

            m1.initDrink();

            m1.chooseDrink();

            m1.insertMony();

            m1.getDrink();

        }

    }

}