Pseudo Code for User Login System

Overview

This pseudo code outlines a simple user login system that verifies usernames and passwords against a predefined dataset.

Data Structure

• A dictionary (user_data) is used to store usernames and their associated passwords.

Functionality

• The program prompts the user for their username and password.
• It checks if the username exists in the dictionary and if the provided password matches the stored password.
• Depending on the outcome, it provides appropriate feedback.

Pseudo Code

BEGIN

    // Define a dictionary to store usernames and passwords
    SET user_data TO {
        'max': 'password123',
        'user2': 'mypassword',
        'user3': 'pass1234'
    }

    // Define the login function
    FUNCTION login()
        // Prompt user for username
        DISPLAY "Enter your username: "
        SET username TO input()

        // Prompt user for password
        DISPLAY "Enter your password: "
        SET password TO input()

        // Check if username exists and password matches
        IF username IS IN user_data THEN
            IF user_data[username] EQUALS password THEN
                DISPLAY "Login successful!"
            ELSE
                DISPLAY "Invalid username or password. Please try again."
            END IF
        ELSE
            DISPLAY "Invalid username or password. Please try again."
        END IF
    END FUNCTION

    // Main execution starts here
    IF main program IS running THEN
        CALL login()
    END IF

END

Key Points

• Data Storage: Utilizes a dictionary for efficient username-password management.
• User Input: Captures user input for login credentials.
• Validation: Ensures both username and password are validated before granting access.
• Feedback: Provides clear messages for login success or failure.

This structured approach enhances maintainability and understandability, making it easier for stakeholders to grasp the functionality and logic behind the system.