Initial commit

Example_src/Chapter1-10/src/ch07/ComputeAvg.java

@@ -0,0 +1,26 @@
+package ch07;
+
+import java.util.InputMismatchException;
+import java.util.Scanner;
+
+public class ComputeAvg {
+    public static void main(String[] args) {
+        int score, num;
+        double avg;
+        Scanner in = new Scanner(System.in);
+        try {
+            System.out.println("请输入总分：");
+            score = in.nextInt();
+            System.out.println("请输入人数：");
+            num = in.nextInt();
+            avg = score / num;
+            System.out.println("平均成绩为：" + avg);
+        } catch (InputMismatchException e1) {
+            System.out.println("输入不是数字！");
+        } catch (ArithmeticException e2) {
+            System.out.println("人数不能为0");
+        } catch (Exception e3) {
+            System.out.println("其他异常：");
+        }
+    }
+}