Encode and Decode Strings in C++ | Caesar Cipher Explained

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This C++ program demonstrates how to encode and decode a string using the Caesar Cipher technique, one of the simplest and oldest encryption methods. In this method, each alphabet in the input string is shifted by a fixed number of positions in the alphabet.

The program includes two main functions:

encode() – Shifts each character in the string forward by a given number of positions.

decode() – Reverses the encoding by shifting characters back to their original positions.
Only alphabetic characters are shifted, preserving the case (uppercase/lowercase), while other characters remain unchanged.

📌 Features:

Supports both uppercase and lowercase letters.

Ignores non-alphabetic characters.

Easy to understand and modify for learning encryption basics.#cpptutorial
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