add all file

ex/ex.java

@@ -1,3 +1,4 @@
+package test;
 import java.util.Scanner;
 
 public class ex

jjcc/jjcc.java

@@ -1,28 +1,36 @@
-package jjcc;
+package test;
 import java.sql.*;
+import java.util.Scanner;
 public class jjcc {
+	static double  x,y;
+	Scanner in=new Scanner(System.in);
+	x=in..nextDouble();
+	y=in..nextDouble();
 	//addition函数实现的是两个数x和y的加法运算
-		public void addition(double  x,double  y) {
+		public void addition() {
 			double  result;
 			result=x+y;
 			System.out.println(x+"+"+y+"="+result);
 			}
 	//subtraction函数实现的是两个数x和y的减法运算
-		public void subtraction(double x,double y) {
+		public void subtraction() {
 			double result;
 			result=x-y;
 			System.out.println(x+"-"+y+"="+result);
 		}
 	//multiplication函数实现的是两个数x和y的乘法运算
-		public void multiplication(double  x,double  y) {
+		public void multiplication() {
 			double  result;
 			result=x*y;
 			System.out.println(x+"*"+y+"="+result);
 		}
 	//division函数实现的是两个数x和y的除法运算
-		public void division(double  x,double  y) {
+		public void division() {
 			double  result;
 			result=x/y;
 			System.out.println(x+"/"+y+"="+result);
 		}
+		public static void main(String[] args) {
+		}
+		}
 }

logax/logax.java

@@ -1,4 +1,4 @@
-package logax;
+package test;
 
 import java.util.Scanner;
 public class Logax

main/Main.java

@@ -0,0 +1,44 @@
+package test;
+import java.util.Scanner;
+public class Main {
+	public static void main(String[] args) {
+		Scanner in=new Scanner(System.in);
+		String s=in.nextLine();
+		String a=new String("e");
+		String b=new String("log");
+		String g=new String("+");
+		String h=new String("-");
+		String l=new String("*");
+		String m=new String("/");
+		if(s.equals(a)) {
+			ex E=new ex();
+			ex.main("");
+			
+		}
+		else if(s.equals(g)||s.equals(h)||s.equals(l)||s.equals(m)) {
+			jjcc jc=new jjcc();
+			if(s.equals(g)) {
+				jc.addition();
+			}
+			else if(s.equals(h)) {
+				jc.subtraction();
+			}
+			else if(s.equals(l)) {
+				jc.multiplication();
+			}
+			else(s.equals(m)){
+				jc.division();
+			}
+		}
+		else if(s.equals(b))
+		{
+			Logax log=new Logax();
+			log.main("");
+		}
+		else {
+			sc SC=new sc();
+			SC.main("");
+		}
+	}
+
+}

sc/sc.java

@@ -1,3 +1,4 @@
+package test;
 import java.util.Scanner;
 public class sc {