Arithmometer.java

@@ -0,0 +1,31 @@
+package com.wpc;
+/* --- coding = utf-8 ---
+ * @Time:     2020/8/6 18:34
+ * @Author:   1807310509
+ * @File:     Arithmometer.java
+ * @Software: IntelliJ IDEA
+ */
+
+public class Arithmometer {
+    private static double result;
+
+    public Arithmometer() {
+    }
+
+    public static double calculator(Double num1,String sign,Double num2) {
+        switch (sign) {
+            case "+":
+                result = num1 + num2;
+                break;
+            case "-":
+                result = num1 - num2;
+                break;
+            case "*":
+                result = num1 * num2;
+                break;
+            case "/":
+                result = num1 / num2;
+        }
+        return result;
+    }
+}

gitTraining.txt

@@ -0,0 +1 @@
+Hello

mypow.java

@@ -1,7 +0,0 @@
-public class mypow{
-	double e,x;
-public double mypow(double e,double x) {
-		double ans=Math.pow(e, x);
-		return ans;
-	}
-}