HW02 運算子表達式

1.NotebookLM

https://notebook.google.com/notebook/38bdd2a8-374e-457e-a72a-6c5175a61f1f

2.YouTube

3.學習卡

4.測驗

5.寫1個程式需附加說明 Create a README For Github

115103104 % 7 + 1 = 5

1. GitHub 專案名稱

python-car-speed-calculator

專案功能：輸入汽車行駛的距離（公尺）與時間（秒），計算汽車的平均速度（公尺／秒）。

2. Python 程式碼：main.py

# Python Car Speed Calculator
# Calculate the speed of a car in meters per second.

# Ask the user to enter the distance in meters
distance = int(input("Enter the distance in meters: "))

# Ask the user to enter the time in seconds
time = int(input("Enter time in seconds: "))

# Calculate the speed
speed = distance / time

# Display the result with two decimal places
print("Speed of vehicle is %.2f" % speed, "meter/second")

程式碼說明

程式碼	功能
input()	讓使用者從鍵盤輸入資料
int()	將輸入的資料轉換成整數
distance	儲存行駛距離，單位是公尺
time	儲存行駛時間，單位是秒
speed = distance / time	計算平均速度
%.2f	將計算結果顯示到小數點後兩位
print()	在終端機顯示計算結果

公式：

$$\text{Speed}=\frac{\text{Distance}}{\text{Time}}$$

注意：時間不能輸入 0，否則程式會發生除以零的錯誤。

3. GitHub README.md

以下是可以直接複製到 GitHub 的 README 文件。

Python Car Speed Calculator

A simple Python program that calculates the average speed of a car in meters per second.

Project Description

This project asks the user to enter the distance traveled by a car in meters and the time taken in seconds. The program then calculates and displays the car's average speed.

Formula

Speed = Distance / Time

• Distance: measured in meters (m)
• Time: measured in seconds (s)
• Speed: measured in meters per second (m/s)

Requirements

• Python 3

How to Run

1. Download or clone this repository.
2. Open a terminal in the project folder.

3. Run the following command:

   python main.py

Example Output

Enter the distance in meters: 1500
Enter time in seconds: 45
Speed of vehicle is 33.33 meter/second

Code Explanation

1. Use input() to receive the distance and time from the keyboard.
2. Use int() to convert the input values into integers.
3. Calculate the speed by dividing the distance by the time.
4. Use print() to display the result.
5. Use %.2f to display the speed to two decimal places.

Project Structure

python-car-speed-calculator/
│
├── main.py
└── README.md

Learning Objectives

• Practice Python keyboard input with input().
• Learn how to convert input values using int().
• Practice arithmetic operations and division.
• Learn how to format decimal output.
• Practice creating and documenting a GitHub repository.

Author

Python Beginner Project

4. GitHub 專案檔案結構

python-car-speed-calculator/

main.py

Python 主程式：計算汽車速度

README.md

英文專案說明、公式、執行方式與輸出範例

5. 執行結果驗證

輸入距離 1500 公尺、時間 45 秒：

$$1500 \div 45 = 33.333\ldots$$

因此程式輸出：

Enter the distance in meters: 1500
Enter time in seconds: 45
Speed of vehicle is 33.33 meter/second

完成後，你的 GitHub Repository 就會是一個完整的 Python 入門練習專案。 你可以把 main.py 和 README.md 分別建立在同一個 Repository 裡，並將 README 當作專案首頁的說明文件。