🔐 String Encryption - Vowel and Number Substitution

🏗️ Developed by Codespark Engineering

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🧩 Project Description

This program automatically generates a phrase containing a name and RU (ID number), then encrypts it by replacing:

• Vowels (A, E, I, O, U) → with numbers (2–6)
• Digits (0–9) → with letters (A–U) following a specific mapping

The result is a transformed string that hides the original content in a simple but illustrative way — useful as a basic introduction to character manipulation, encryption logic, and pointer arithmetic in C.

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⚙️ Features

• ✍️ Automatically generates a string with full name and RU.
• 🔄 Replaces vowels with predefined numbers:
  • A → 2
  • E → 3
  • I → 4
  • O → 5
  • U → 6
• 🔄 Replaces numbers with predefined vowels:
  • 0 → A
  • 1 → E
  • 2 → I
  • 3 → O
  • 4 → U
  • 5 → a
  • 6 → e
  • 7 → i
  • 8 → o
  • 9 → u
• 🧭 Uses pointers to traverse and modify the string directly.
• 📤 Prints both the original and encrypted string.

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