"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-06 00:16:33.839106
"""

```python
from typing import Callable, Any, Optional


class FallbackExecutor:
    """
    A class for executing a main function and providing a fallback in case of errors.

    :param main_func: The primary function to be executed.
    :param fallback_func: The function to be executed as a fallback if an error occurs.
    """

    def __init__(self, main_func: Callable[[], Any], fallback_func: Optional[Callable[[], Any]] = None):
        self.main_func = main_func
        self.fallback_func = fallback_func

    def execute(self) -> Any:
        """
        Execute the main function. If an error occurs during execution, attempt to run the fallback function.

        :return: The result of the main function if it executes successfully.
                 The result of the fallback function otherwise.
        """
        try:
            return self.main_func()
        except Exception as e:
            if self.fallback_func is not None:
                print(f"Error occurred in main function: {e}. Executing fallback function.")
                return self.fallback_func()
            else:
                raise


# Example usage
def main_function() -> int:
    """
    A sample main function that may raise an error.
    
    :return: An integer result.
    """
    # Simulate a failure condition
    try:
        1 / 0
    except ZeroDivisionError:
        return -1  # Error occurred, return a special value

    return 42


def fallback_function() -> int:
    """
    A sample fallback function that returns a default value.
    
    :return: An integer result.
    """
    print("Executing fallback function.")
    return 0


# Create an instance of FallbackExecutor
executor = FallbackExecutor(main_function, fallback_function)

# Execute the main and fallback functions
result = executor.execute()

print(f"Final result: {result}")
```