1 package day2;
2 import java.util.Scanner;
3
4 /**
5 * @Author: haifei
6 * 数据输入、流程控制语句
7 */
8
9 public class Demo1_0519 {
10 public static void main(String[] args){
11 // test1();
12 // test2();
13 test3();
14 }
15
16 public static void test1(){
17 /*
18 1、导包
19 2、创建Scanner对象
20 3、接收数据
21 */
22 Scanner sc = new Scanner(System.in);
23 // System.out.print("请输入：");
24 // int x = sc.nextInt();
25 // System.out.println("x=" + x);
26
27 System.out.print("请输入第1个人的身高：");
28 int height1 = sc.nextInt();
29 System.out.print("请输入第2个人的身高：");
30 int height2 = sc.nextInt();
31 System.out.print("请输入第3个人的身高：");
32 int height3 = sc.nextInt();
33 int tempHeight = (height1 > height2) ? height1 : height2;
34 int maxHeight = (tempHeight > height3) ? tempHeight : height3;
35 System.out.println("最高身高：" + maxHeight);
36 }
37
38 public static void test2(){
39 /*
40 顺序结构
41 分支结构(if, switch)
42 循环结构(for, while, do…while)
43 */
44 int a = 10;
45 int b = 20;
46
47 System.out.println("begin");
48 if(a == b){
49 System.out.println("a==b");
50 }
51 System.out.println("end");
52
53 System.out.println("begin");
54 if(a > b){
55 System.out.println("a>b");
56 }else {
57 System.out.println("a<=b");
58 }
59 System.out.println("end");
60
61 // 案例：任意给出一个整数，请用程序实现判断该整数是奇数还是偶数，并在控制台输出该整数是奇数还是偶数。
62 Scanner sc = new Scanner(System.in);
63 System.out.print("请输入一个整数:");
64 int num = sc.nextInt();
65 if(num % 2 == 0){
66 System.out.println(num + "是偶数");
67 }else {
68 System.out.println(num + "不是偶数");
69 }
70
71 System.out.print("请输入1-7间的一个整数：");
72 int week = sc.nextInt();
73 if(week == 1){
74 System.out.println("星期一");
75 }else if(week == 2){
76 System.out.println("星期二");
77 }else if(week == 3){
78 System.out.println("星期三");
79 }else if(week == 4){
80 System.out.println("星期四");
81 }else if(week == 5){
82 System.out.println("星期五");
83 }else if(week == 6){
84 System.out.println("星期六");
85 }else if(week == 7){
86 System.out.println("星期日");
87 }else {
88 System.out.println("输入错误");
89 }
90
91 // 案例
92 System.out.print("请输入小明的分数(0-100整数)：");
93 int score = sc.nextInt();
94 if (score<0 || score>100){
95 System.out.println("输入分数有误");
96 }else if (score>90 && score<=100){
97 System.out.println("奖励捷安特一台");
98 }else if (score>75 && score<=90){
99 System.out.println("奖励手办一个");
100 }else if (score>60 && score<=75){
101 System.out.println("奖励棒棒糖一根");
102 }else {
103 System.out.println("不及格，一顿打");
104 }
105 //数据测试：正确数据，边界数据，错误数据 --> 程序健壮
106 }
107
108 public static void test3(){
109 Scanner sc = new Scanner(System.in);
110 System.out.print("请输入1-7间的一个整数：");
111 int week = sc.nextInt();
112 switch (week){
113 case 1:
114 System.out.println("周一");
115 break;
116 case 2:
117 System.out.println("周二");
118 break;
119 case 3:
120 System.out.println("周三");
121 break;
122 case 4:
123 System.out.println("周四");
124 break;
125 case 5:
126 System.out.println("周五");
127 break;
128 case 6:
129 System.out.println("周六");
130 break;
131 case 7:
132 System.out.println("周日");
133 break;
134 default:
135 System.out.println("输入错误");
136 break;
137 }
138
139 // 案例
140 System.out.print("请输入月份（1-12间整数）");
141 int month = sc.nextInt();
142 switch (month){ // 利用case穿透
143 case 1:
144 case 2:
145 case 12:
146 System.out.println("冬季");
147 break;
148 case 3:
149 case 4:
150 case 5:
151 System.out.println("春季");
152 break;
153 case 6:
154 case 7:
155 case 8:
156 System.out.println("夏季");
157 break;
158 case 9:
159 case 10:
160 case 11:
161 System.out.println("秋季");
162 break;
163 default:
164 System.out.println("输入错误");
165 }
166 }
167
168 }
