commit ef8c6376604e33c29713870468ee064b33777d13
Author: gakki husband <1479466759@qq.com>
Date:   Thu Aug 6 15:12:01 2020 +0800

    对数运算完成

diff --git a/Calculator.java b/Calculator.java
new file mode 100644
index 0000000..65e1573
--- /dev/null
+++ b/Calculator.java
@@ -0,0 +1,46 @@
+
+package cn.edu.gxu;
+
+import java.util.Scanner;
+
+
+public class Calculator {
+    public static void main(String[] args) 
+    {
+        Scanner sc=new Scanner(System.in);
+        double result=1.0;
+        String Command=sc.nextLine();
+        String parameters=sc.nextLine();
+        if(Command.equals("0"))
+            result=Calculator.Log(parameters);
+//        else if(Command.equals("1"))
+//            result=Calculator.ex(parameters);
+//        else if(Command.equals("2"))
+//            result=Calculator.jjcc(parameters);
+//        else
+//            result=Calculator.sin(parameters);
+        System.out.println(result);
+        
+    }
+    public static double Log(String s)
+    {
+        String[] parameters=new String[2];
+        parameters=s.split(" ");//用空格切分传过来的两个数字
+        float a=Float.parseFloat(parameters[0]);
+        float b=Float.parseFloat(parameters[1]);
+        double result=Math.log(b)/Math.log(a);  //log 都是用e为底，还要用个换底公式OvO
+        return result;
+    }
+    public static double sin()
+    {
+        
+    }
+    public static double jjcc()//加减乘除哈哈
+    {
+        
+    }
+    public static double ex()//e的幂
+    {
+        
+    }
+}