"Check Palindrome Number" Challenge

🌟 **Hello Aspiring Coders!**

**Challenge:** Create a C program that checks whether a given number is a palindrome or not. A palindrome number is a number that reads the same forward and backward (e.g., 121, 1331). This task will enhance your skills in loops, conditionals, and number manipulation.

**Instructions:**

1. Fork this repository.
2. Create a new branch.
3. Write a C program that takes an integer input from the user and determines if it's a palindrome number.
4. Ensure the program handles negative numbers and provides clear output indicating whether the number is a palindrome or not.
5. Commit your changes and submit a pull request.

**Bonus:** Optimize your program to handle larger numbers efficiently.

**Happy Coding!** 🚀

*Note: This beginner-friendly issue is a great opportunity to practice loops, conditionals, and number manipulation in C!*

Inspect the repository's existing C program layout and conventions before adding the challenge. Implement the integer-input palindrome check with clear results, including negative numbers, then manually verify palindrome and non-palindrome examples such as 121 and 1331.

索引モデルが issue の本文から書いたものです。