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Climate Quest - Task 5

Objectives

  • Understand the role of a main() function
  • Understand the concept of built-in functions in Python.
  • Learn how to use some commonly used built-in functions for math, strings, and basic input/output.
  • Explore the purpose and usage of functions like print(), len(), input(), and more.

The main() function

In many programming languages, there is a designated starting point where the program begins execution. In Python, this convention is followed using a special function often called main(), along with a specific conditional statement to ensure that this function runs when the script is executed directly.

The main() function serves as the entry point for the program. It organizes the code and provides a clear structure, making the program easier to understand and maintain.

For example:

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def main():
    # Your main program logic here
    print("Hello, World!")

main()

Tip

For this task, and any future tasks, do not forget to include this entry point in your code.

Task Overview:

In this homework, you will further develop the "Climate Quest" adventure game by incorporating several built-in functions, organizing the code with a main() function and writing a function to validate input from the user.

Questions

  1. Create the main() Function:

    • Refactor your existing code to include a main() function. Move the game initialization and the main gameplay loop into this function.

  2. Enhanced Welcome Message:

    • Modify the main() function to display a message that includes the length of the player's name entered by the user using the len() function.

  3. Enhanced Environmental Health Check:

    • Update the ocean_challenge() and forest_challenge() functions to display the absolute value of changes in environmental health using the abs() function.

  4. Validate User Input:

    • Create a get_valid_input() function that uses str.isdigit() to ensure that numeric inputs are valid. This is used when the user is selecting the location from the menu, and the options presented by each of the challenges.
If you're stuck, take a look here

Instructions:

  1. Create the main() Function:

    • Introduce the main() function as the entry point for the program.
    • Move the game initialisation and the main gameplay loop into the main() function.

  2. Enhanced Welcome Message:

    • Use the len() function to display the length of the player's name entered by the user.

  3. Enhanced Environmental Health Check:

    • Use the abs() function to display the absolute value of changes in environmental health.

  4. Validate User Input:

    • Use the str.isdigit() function to ensure that numeric inputs are valid numbers.
If you're really stuck ...

Detailed Steps:

  1. Create the main() Function:

    Refactor the existing code to include a main() function. The main() function should initialize the game and handle the main gameplay loop.

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    def main():
    # Initialize Game
    display_message("Welcome to Climate Quest!")
    player_name = get_user_input("Enter your name: ")
    display_message(f"Hello, {player_name}! Your name has {len(player_name)} characters.")
    environment_health = initialize_health(100)
    display_message(f"Initial environmental health: {environment_health}")

    # Gameplay Loop
    for _ in range(3):  # Example loop for 3 challenges
        location = choose_location()
        environment_health = handle_challenge(location, environment_health)
        display_message(f"Updated environmental health: {environment_health}")

    # End Game
    display_message("Thank you for playing Climate Quest!")

# Run the game
display_welcome_message()
player_name = get_player_name()
main()

    This code will need the following functions, if not already present in your code.

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    def display_message(message):
    print(message)

def get_user_input(prompt):
    return input(prompt)

def initialize_health(initial_value):
    return initial_value

  2. Enhanced Environmental Health Check:

    Update the challenge functions to use the abs() function when displaying the changes in environmental health.

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    def ocean_challenge(environment_health):
    display_message("You are addressing ocean pollution.")
    cleanup_amount = get_valid_input("Enter the amount of pollution cleaned (0-100): ")
    change = -cleanup_amount
    display_message(f"Change in environmental health: {abs(change)}")
    return update_health(environment_health, change)

def forest_challenge(environment_health):
    display_message("You are tackling deforestation.")
    trees_planted = get_valid_input("Enter the number of trees planted: ")
    change = 20 if trees_planted > 50 else -10
    display_message(f"Change in environmental health: {abs(change)}")
    return update_health(environment_health, change)

# Repeat this pattern in all challenge functions that require numeric input...

  3. Validate User Input:

    Create a helper function get_valid_input() to ensure numeric inputs are valid. Use this function in the challenge functions.

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    def get_valid_input(prompt):
    while True:
        user_input = get_user_input(prompt)
        if user_input.isdigit():
            return int(user_input)
        else:
            display_message("Invalid input. Please enter a number.")