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+# 作业
+
+~~~java
+package yiyi;
+//5.某市不同车牌的出租车3千米的起步价和计费分别为：夏利3元，3千米以外，2.1/千米以外，
+//富康4元，3千米以外，2.4/千米；桑塔纳5元，3千米以外，2.7/千米。编程实现从键盘
+//输入乘车的车型及行车千米数，输出对应车费。
+import java.sql.SQLOutput;
+import java.util.Scanner;
+
+public class Y1 {
+    public static void main(String[] args) {
+        Scanner sc=new Scanner(System.in);
+        System.out.println("请输入车型");
+        char cx =sc.next().charAt(0);
+        System.out.println("请输入千米数");
+        double a =sc.nextDouble();
+        double b =0;
+        switch (cx){
+            case '1':
+                if(a>3){
+                    b=(a-3)*2.1+3;
+                }else {
+                    b=3;
+                }
+                break;
+            case '2':
+                if(a>3){
+                    b=(a-3)*2.4+4;
+                }else {
+                    b=4;
+                }
+                break;
+            case '3':
+                if (a>3){
+                    b=(a-3)*2.7+5;
+                }else {
+                    b=5;
+                }
+                break;
+            default:
+                System.out.println("请输入正确的车型");
+        }
+        System.out.println("应付车费："+b+"块");
+    }
+}
+
+
+~~~
+
+~~~java
+package yiyi;
+
+import java.util.Scanner;
+
+public class Y2 {
+    public static void main(String[] args) {
+        //1.使用switch和if语句算出今天是今年第几天（提示：以3月3日为例，应该先把前两个月的天数加起来,
+// 然后再加上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）。
+         class D2 {
+            public static void main(String[] args) {
+                Scanner sc=new Scanner(System.in);
+                System.out.println("请输入年份：");
+                int a1 = sc.nextInt();
+                System.out.println("请输入月份：");
+                int a2 = sc.nextInt();
+                System.out.println("请输入日份：");
+                int a3 = sc.nextInt();
+                //定义变量
+                int b1 =0;
+                int b2 =31;
+                int b3 =30;
+                int ts =0;
+                if (a1 % 4 == 0 && a1 % 100 == 0 || a1 %400==0){
+                    ts =29;
+                    if(a1>=3){
+                        ts=30;
+                    }
+                    else {
+                        ts=28;
+                    }
+                    if(a2>1){
+                        int sh =a2-1;
+                        switch (sh){
+                            case 2:
+                                b1=a3+b2+ts;
+                                break;
+                            case 3:
+                                b1=2*a3+b2+ts;
+                                break;
+                            case 4:
+                                b1=2*a3+sh+b3+b2+ts;
+                                break;
+                            case 5:
+                                b1=3*a3+sh+b3+b2+ts;
+                                break;
+                            case 6:
+                                b1=3*a2+2*sh+b2+ts;
+                                break;
+                            case 7:
+                                b1=4*a2+3*sh+b2+ts;
+                            case 8:
+                                b1=4*a2+3*sh+b2+ts;
+                                break;
+                            case 9:
+                                b1=5*a2+3*sh+b2+ts;
+                                break;
+                            case 10:
+                                b1=5*a2+4*sh+b2+ts;
+                                break;
+                            case 11:
+                                b1=6*a2+24*sh+b2+ts;
+                                break;
+
+                        }
+
+                    }else{
+                        b1=a3;
+                    }
+                    System.out.println(a1+"年"+b2+"月"+a3+"日期"+"是今年的第"+b1+"天");
+                }
+            }
+        }
+    }
+}
+
+~~~
+