diff --git "a/44 \344\273\243\347\221\236/20221128 java\344\275\234\344\270\232.md" "b/44 \344\273\243\347\221\236/20221128 java\345\237\272\347\241\200.md"
similarity index 100%
rename from "44 \344\273\243\347\221\236/20221128 java\344\275\234\344\270\232.md"
rename to "44 \344\273\243\347\221\236/20221128 java\345\237\272\347\241\200.md"
diff --git "a/44 \344\273\243\347\221\236/20221130 java\344\275\234\344\270\232.md" "b/44 \344\273\243\347\221\236/20221130 java\350\277\220\347\256\227.md"
similarity index 100%
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diff --git "a/44 \344\273\243\347\221\236/20221202 java\350\241\245\345\205\205switsh\345\210\206\346\224\257.md" "b/44 \344\273\243\347\221\236/20221202 java\350\241\245\345\205\205switsh\345\210\206\346\224\257.md"
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@@ -0,0 +1,181 @@
+## 笔记
+
+switch(表达式){
+
+case (条件)
+
+ sout
+
+ break(结束分支)
+
+defauct(默认，前面条件不满足执行默认)
+
+}
+
+equals
+
+char name=sc.next.charAt(0)(扫描器输入字符串)
+
+## 第一题
+
+```java
+import java.util.Scanner;
+
+public class work {
+ public static void main(String[] args) {
+ Scanner sc = new Scanner(System.in);
+ System.out.println("请输入车型");
+ int car = sc.nextInt();
+ /*String 夏利 = "夏利";
+ String 富康 = "富康";
+ String 桑塔纳 = "桑塔纳";*/
+ Scanner scan = new Scanner(System.in);
+ System.out.println("请支付车费");
+ int pay = sc.nextInt();
+ int a= 3;
+ /*double a= (pay-3)*2.1;
+ double b= (pay-3)*2.4;
+ double c= (pay-3)*2.7;*/
+ switch (car){
+ case 1 :if (pay>a)
+ System.out.println((pay-a)*2.1);
+ else if (pay0 ){
+ System.out.println(pay==a);
+ }
+ System.out.println("夏利");
+ break;
+ case 2 :if (pay0){
+ System.out.println((pay-3)*2.4);
+ }
+ else if (pay0 ){
+ System.out.println(pay==a);
+ System.out.println("富康");
+ break;
+// if (pay0){
+
+ }
+ else if (pay0 ){
+ System.out.println((pay-a)*2.7);
+ }
+ case 3 :{
+ System.out.println("桑塔纳");
+ }
+ break;
+
+ default:
+ System.out.println("输入错误");
+ break;
+ }
+
+
+
+
+ }
+ }
+```
+
+## 第二题
+
+```java
+import java.util.Scanner;
+
+public class work2 {
+ public static void main(String[] args) {
+ //使用switch和if语句算出今天是今年的第几天（提升：以三月三日为例，应该先把前两个月的天数加起来，然后在加上3天即为本年的第几天；
+ //需要考虑闰年的情况，如果输入的年份是闰年且输入的月份大于或等于3，需要多加一天）。
+ Scanner sc = new Scanner(System.in);
+ System.out.println("请输入年份：");
+ int nf = sc.nextInt();
+ System.out.println("请输入月份（1-12）");
+ int yf = sc.nextInt();
+ System.out.println("请输入日份（1-31）");
+ int rf = sc.nextInt();
+ if (nf % 4 == 0) {
+ switch (yf) {
+ case 1:
+ System.out.print("今天是今年的第" + rf + "天");
+ break;
+ case 2:
+ System.out.print("今天是今年第" + (31 + rf) + "天");
+ break;
+ case 3:
+ System.out.print("今天是今年第" + (31 + 29 + rf) + "天");
+ break;
+ case 4:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + rf) + "天");
+ break;
+ case 5:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + 30 + rf) + "天");
+ break;
+ case 6:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + 30 + 31 + rf) + "天");
+ break;
+ case 7:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + 30 + 31 + 30 + rf) + "天");
+ break;
+ case 8:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + 30 + 31 + 30 + 31 + rf) + "天");
+ break;
+ case 9:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + rf) + "天");
+ break;
+ case 10:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + rf) + "天");
+ break;
+ case 11:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + rf) + "天");
+ break;
+ case 12:
+ System.out.print("今天是今年第" + (31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + rf) + "天");
+ break;
+ default:
+ System.out.println("输入错误！！！");
+ }
+
+ } else if (nf % 4 != 0) {
+ switch (yf) {
+ case 1:
+ System.out.print("今天是今年的第" + rf + "天");
+ break;
+ case 2:
+ System.out.print("今天是今年第" + (31 + rf) + "天");
+ break;
+ case 3:
+ System.out.print("今天是今年第" + (31 + 28 + rf) + "天");
+ break;
+ case 4:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + rf) + "天");
+ break;
+ case 5:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + 30 + rf) + "天");
+ break;
+ case 6:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + 30 + 31 + rf) + "天");
+ break;
+ case 7:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + 30 + 31 + 30 + rf) + "天");
+ break;
+ case 8:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + 30 + 31 + 30 + 31 + rf) + "天");
+ break;
+ case 9:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + rf) + "天");
+ break;
+ case 10:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + rf) + "天");
+ break;
+ case 11:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + rf) + "天");
+ break;
+ case 12:
+ System.out.print("今天是今年第" + (31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + rf) + "天");
+ break;
+ default:
+ System.out.println("输入错误！！！");
+ }
+ }else {
+ System.out.println("输入错误");
+ }
+ }
+}
+```
\ No newline at end of file