From c1e578b22ff864eb4d016759369ad53e164e75f6 Mon Sep 17 00:00:00 2001
From: Kirill Kornakov <KirillKornakov@narod.ru>
Date: Fri, 1 Feb 2019 21:50:57 +0300
Subject: [PATCH 1/3] 01/02/2019

---
 src/crypto/Crypto.java | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/src/crypto/Crypto.java b/src/crypto/Crypto.java
index 51d57b7..04b2cb0 100644
--- a/src/crypto/Crypto.java
+++ b/src/crypto/Crypto.java
@@ -3,8 +3,36 @@
 import java.util.Scanner;
 
 public class Crypto {
+    private static void encryption(String message, int key) {
+        char let;
+        char let2;
+        StringBuilder str = new StringBuilder(message);
+        for (int i=0; i<str.length(); i++){
+            let = str.charAt(i);
+            let2=(char)(let+key);
+                str.setCharAt(i, let2);}
+        System.out.println(str);
+    }
+    private static void decryption(String message, int key) {
+        char let;
+        char let2;
+        StringBuilder str = new StringBuilder(message);
+        for (int i=0; i<str.length(); i++){
+            let = str.charAt(i);
+            let2=(char)(let-key);
+            str.setCharAt(i, let2);}
+        System.out.println(str);
+    }
+
     public static void main(String[] args) {
-        Scanner scanner = new Scanner(System.in);
-	// write your code here
+        Scanner scan = new Scanner(System.in);
+        String target = scan.nextLine();
+        String message = scan.nextLine();
+        int key = scan.nextInt();
+        if (target.equals("enc")) {
+            encryption(message, key);
+        }
+        else if (target.equals("dec")) decryption(message, key);
+
     }
 }

From d71a377442470ddee113c370281478c9f570335a Mon Sep 17 00:00:00 2001
From: Kirill Kornakov <KirillKornakov@narod.ru>
Date: Sat, 2 Feb 2019 11:53:15 +0300
Subject: [PATCH 2/3] Stage #4: Using command-line arguments

---
 .idea/misc.xml         |  2 +-
 .idea/modules.xml      |  2 +-
 .idea/project.iml      | 10 ----------
 src/crypto/Crypto.java | 22 ++++++++++++++++------
 4 files changed, 18 insertions(+), 18 deletions(-)
 delete mode 100644 .idea/project.iml

diff --git a/.idea/misc.xml b/.idea/misc.xml
index a165cb3..1bb046f 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" default="false" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_10" project-jdk-name="10" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
index a0733a5..f857c90 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -2,7 +2,7 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/project.iml" filepath="$PROJECT_DIR$/.idea/project.iml" />
+      <module fileurl="file://$PROJECT_DIR$/encryption.iml" filepath="$PROJECT_DIR$/encryption.iml" />
     </modules>
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/project.iml b/.idea/project.iml
deleted file mode 100644
index 47baa8c..0000000
--- a/.idea/project.iml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>
\ No newline at end of file
diff --git a/src/crypto/Crypto.java b/src/crypto/Crypto.java
index 04b2cb0..32519c0 100644
--- a/src/crypto/Crypto.java
+++ b/src/crypto/Crypto.java
@@ -26,13 +26,23 @@ private static void decryption(String message, int key) {
 
     public static void main(String[] args) {
         Scanner scan = new Scanner(System.in);
-        String target = scan.nextLine();
-        String message = scan.nextLine();
-        int key = scan.nextInt();
-        if (target.equals("enc")) {
-            encryption(message, key);
+        String message, target;
+        int key;
+        int indTarget=-1, indMessage=-1, indKey=-1;
+        for (int i=0; i<args.length-1; i++){
+            if(args[i].equals("-mode")) indTarget=i;
+            if(args[i].equals("-key")) indKey=i;
+            if(args[i].equals("-data")) {indMessage=i; break;}
         }
-        else if (target.equals("dec")) decryption(message, key);
+
+        if(indTarget>=0) target=args[indTarget+1];
+        else target="enc";
+        if (indKey>=0) key=Integer.valueOf(args[indKey+1]);
+        else key = scan.nextInt();
+        if (indMessage>=0) message=args[indMessage+1];
+        else message = scan.nextLine();
+        if (target.equals("enc") || target.equals("")) encryption(message, key);
+        else decryption(message, key);
 
     }
 }

From 27aa044098b173a45e5052d76dc9194c0d6e396e Mon Sep 17 00:00:00 2001
From: Kirill Kornakov <KirillKornakov@narod.ru>
Date: Tue, 5 Feb 2019 22:43:56 +0300
Subject: [PATCH 3/3] Working with files/kornakov

---
 src/crypto/Crypto.java | 68 ++++++++++++++++++++++++++++++++----------
 1 file changed, 52 insertions(+), 16 deletions(-)

diff --git a/src/crypto/Crypto.java b/src/crypto/Crypto.java
index 32519c0..8801801 100644
--- a/src/crypto/Crypto.java
+++ b/src/crypto/Crypto.java
@@ -1,19 +1,27 @@
 package crypto;
-
 import java.util.Scanner;
-
+import java.io.*;
 public class Crypto {
-    private static void encryption(String message, int key) {
+    private static void encryption(String message, int key, String out) {
         char let;
         char let2;
         StringBuilder str = new StringBuilder(message);
         for (int i=0; i<str.length(); i++){
             let = str.charAt(i);
             let2=(char)(let+key);
-                str.setCharAt(i, let2);}
-        System.out.println(str);
+            str.setCharAt(i, let2);}
+        if (out.length()>0){
+            File file = new File(out);
+           try(FileWriter writer = new FileWriter(file)){
+               writer.write(str.toString());
+           } catch (IOException e){
+               System.out.println("The file can not be opened: " + out);
+           }
+
+        }
+        else  System.out.println(str);
     }
-    private static void decryption(String message, int key) {
+    private static void decryption(String message, int key, String out) {
         char let;
         char let2;
         StringBuilder str = new StringBuilder(message);
@@ -21,28 +29,56 @@ private static void decryption(String message, int key) {
             let = str.charAt(i);
             let2=(char)(let-key);
             str.setCharAt(i, let2);}
-        System.out.println(str);
+        if (out.length()>0){
+            File file = new File(out);
+            try(FileWriter writer = new FileWriter(file)){
+                writer.write(str.toString());
+            } catch (IOException e){
+                System.out.println("The file can not be opened: " + out);
+            }
+
+        }
+        else  System.out.println(str);
     }
 
     public static void main(String[] args) {
         Scanner scan = new Scanner(System.in);
-        String message, target;
+        String message="", target;
         int key;
-        int indTarget=-1, indMessage=-1, indKey=-1;
-        for (int i=0; i<args.length-1; i++){
+        int kostil=0;
+        String out="";
+        int indTarget=-1, indMessage=-1, indKey=-1, indIn=-1, indOut=-1;
+        for (int i=0; i<args.length; i++){
             if(args[i].equals("-mode")) indTarget=i;
             if(args[i].equals("-key")) indKey=i;
-            if(args[i].equals("-data")) {indMessage=i; break;}
+            if(args[i].equals("-data")) indMessage=i;
+            if(args[i].equals("-in")) indIn=i;
+            if(args[i].equals("-out")) indOut=i;
         }
 
         if(indTarget>=0) target=args[indTarget+1];
         else target="enc";
         if (indKey>=0) key=Integer.valueOf(args[indKey+1]);
         else key = scan.nextInt();
-        if (indMessage>=0) message=args[indMessage+1];
-        else message = scan.nextLine();
-        if (target.equals("enc") || target.equals("")) encryption(message, key);
-        else decryption(message, key);
+
+         if (indIn>=0) {
+            File in = new File(args[indIn+1]);
+            try(Scanner scanner = new Scanner(in)){
+                message = scanner.nextLine();
+            } catch (FileNotFoundException e){
+                System.out.println("File is not found: " + in);
+                message=scan.nextLine();
+            }
+        }
+        if (message.length()>0) kostil++;
+        else if (indMessage >=0 ) message = args[indMessage+1];
+         else message=scan.nextLine();
+        if (indOut>=0) {
+            out =args[indOut+1];
+        }
+        System.out.println(out);
+        if (target.equals("enc") || target.equals("")) encryption(message, key, out);
+        else decryption(message, key, out);
 
     }
-}
+}
\ No newline at end of file