"""Create fallback_executor
Generated by Phi-Octopus Eden
2025-11-07 07:50:05.637038
"""

```python
class FallbackExecutor:
    """
    A class for executing tasks with fallback mechanisms in case of errors.
    
    This class provides a method to run a task that may fail and automatically
    tries an alternative function if the primary one raises an exception.

    :param task: The primary function to execute. It should accept no arguments.
    :type task: callable
    :param fallback: The fallback function to use in case of failure. It should accept no arguments.
    :type fallback: callable
    """
    
    def __init__(self, task: callable, fallback: callable):
        self.task = task
        self.fallback = fallback
    
    def execute(self) -> None:
        """
        Execute the primary function. If an exception occurs during execution,
        run the fallback function.
        
        :return: None
        """
        try:
            result = self.task()
            print(f"Task executed successfully: {result}")
        except Exception as e:
            print(f"Task failed with error: {e}")
            self.fallback()

# Example usage

def primary_function() -> str:
    """A function that simulates a task which may fail."""
    raise ValueError("Oops! An error occurred.")
    
def fallback_function() -> str:
    """A simple fallback function to execute when the primary fails."""
    return "Executing fallback..."

executor = FallbackExecutor(task=primary_function, fallback=fallback_function)
executor.execute()
```