New Python Program: Simple Calculator

创建名为 simple_calculator.py 的文件，将其实现为 Python 3 命令行程序。首先查看任务要求，然后使用示例输入、每种算术运算、无效输入和除以零的情况运行它。程序能够清晰地提示、返回正确结果并妥善处理错误后，即可完成。

Hello Python enthusiasts! Let's enhance our repository with a Simple Calculator implemented in Python. This beginner-friendly task involves creating a command-line calculator that can perform basic arithmetic operations. This program will showcase fundamental input handling, arithmetic operations, and conditional statements in Python.

Tasks:

• Implement functions for addition, subtraction, multiplication, and division.
• Allow users to input two numbers and select an operation (+, -, *, /).
• Perform the corresponding operation and display the result to the user.
• Handle division by zero and invalid inputs gracefully.
• Provide clear instructions and error messages for the users.

Guidelines:

• Use Python 3.x for the program.
• Implement functions to handle each arithmetic operation separately.
• Ensure the calculator provides clear prompts and feedback to the user.
• Include comments in your code to explain the logic and functionality.
• Test the calculator with various inputs to ensure accurate calculations.

Example:

Welcome to the Simple Calculator!

Please enter the first number: 10
Please enter the second number: 5
Select operation (+, -, *, /): +

Result: 10 + 5 = 15

How to Contribute:

1. Fork this repository.
2. Create a new Python file for the Simple Calculator: simple_calculator.py.
3. Write the Python program following the specified tasks and guidelines.
4. Test the calculator thoroughly to ensure it functions correctly.
5. Commit your changes: git commit -m "Add Simple Calculator program"
6. Push to your branch: git push origin add-simple-calculator
7. Open a pull request to this repository.

Your contribution will provide users with a handy tool for basic calculations. Thank you for creating this useful Python program for our repository!