From 32f35f5595e4fa0c02a9240b912bb3adc74f7198 Mon Sep 17 00:00:00 2001
From: Nitya Prakash <43900148+nityaprakash10@users.noreply.github.com>
Date: Mon, 11 Oct 2021 21:33:56 +0530
Subject: [PATCH] Create caesarcipher.c

---
 cipher/caesarcipher.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 cipher/caesarcipher.c

diff --git a/cipher/caesarcipher.c b/cipher/caesarcipher.c
new file mode 100644
index 0000000..66bd5fa
--- /dev/null
+++ b/cipher/caesarcipher.c
@@ -0,0 +1,38 @@
+using System;
+using System.Text;
+ 
+public class CaesarCipher
+{
+    // Encrypts text using a shift od s
+    public static StringBuilder encrypt(String text, int s)
+    {
+        StringBuilder result= new StringBuilder();
+ 
+        for (int i=0; i<text.Length; i++)
+        {
+            if (char.IsUpper(text[i]))
+            {
+                char ch = (char)(((int)text[i] +
+                                s - 65) % 26 + 65);
+                result.Append(ch);
+            }
+            else
+            {
+                char ch = (char)(((int)text[i] +
+                                s - 97) % 26 + 97);
+                result.Append(ch);
+            }
+        }
+        return result;
+    }
+ 
+    // Driver code
+    public static void Main(String[] args)
+    {
+        String text = "ATTACKATONCE";
+        int s = 4;
+        Console.WriteLine("Text : " + text);
+        Console.WriteLine("Shift : " + s);
+        Console.WriteLine("Cipher: " + encrypt(text, s));
+    }
+}