Add Windows version installation instructions to README (#89)

* Add installation instructions to README

* Fix README

README.md

@@ -27,7 +27,7 @@ Open COBOL ESQL 4J (OCESQL 4J) consits of open-source Embedded SQL pre-compiler
 * [sbt](https://www.scala-sbt.org/).
 
 
-## Installation
+## Installation (Linux)
 
 ### Install opensource COBOL 4J
 
@@ -57,3 +57,60 @@ Then, add `/usr/lib/Open-COBOL-ESQL-4J/ocesql4j.jar` to $CLASSPATH.
 ```sh
 export CLASSPATH="$CLASSPATH":/usr/lib/Open-COBOL-ESQL-4J/ocesql4j.jar
 ```
+## Installation (Windows)
+### Install opensource COBOL 4J
+
+See [README.md of opensource COBOL 4J](https://github.com/opensourcecobol/opensourcecobol4j/blob/develop/README.md).
+
+### Copy libcobj.jar
+Copy "libcobj.jar", generated by the installation of opensourcecobol4j, into "dblibj/lib".
+
+### sbt
+Download [here](https://www.scala-sbt.org/download/) and install it.
+
+### Install Open COBOL ESQL 4J
+#### Install Visual Studio
+The Windows version of Open COBOL ESQL 4J uses the CL compiler included in Visual Studio 2022, so you must have [Visual Studio](https://visualstudio.microsoft.com/) installed beforehand.
+
+
+#### Build a solution file
+1. Download the complete set of files for opensource COBOL 4J.
+2. Open win/ocesql.sln with Visual Studio.
+3. Select "Debug" or "Release" mode.
+![alt text](image/readme1.png)
+4. Click "Build" -> "Build Solution".
+![alt text](image/readme2.png)
+After the build is completed, "cobj.exe" will be created in `win/x64/Debug` or `win/x64/Release`.
+
+#### Build Scala Files
+2. Open PowerShell.
+
+3. Move to "dblibj" directory.
+   ```
+    cd dblibj
+   ```
+4. Execute the following command.
+   ```
+   sbt assembly
+   ```
+
+#### Place files in the appropriate location
+1. If you build in Debug mode, change the 5th line of "win/install.ps1" from `\x64\Release\cobj.exe` to `\x64\Debug\cobj.exe`.
+2. Open PowerShell
+3. Move to "win" directory and execute "install.ps1".  
+    ```
+    cd win
+    .\install.ps1
+    ```
+* Each file is placed in the following location. 
+
+    | File name | Location |
+    |---|---|
+    | ocesql.exe | C:\ocesql4j\bin |
+    | ocesql4j.jar | C:\ocesql4j\lib |
+
+*  If you want to change the location of the files, modify "install.ps1".
+
+#### Set the environment variables
+1. Add C:\ocesql4j\bin to "PATH".
+2. Add C:\ocesql4j\lib\ocesql4j.jar to "CLASSPATH".