In embedded systems with memory constraints, storage size becomes a primary concern. A float generally occupies 4 bytes, while a double occupies 8 bytes. Hence, if precision offered by float is acceptable for the application, it would be preferable to use float to save memory space.

The continue statement, when encountered inside a loop, causes the program to skip the rest of the current iteration and move directly to the loop condition to check if the next iteration should commence. In essence, it "continues" to the next iteration of the loop without finishing the current one.

When a class contains a pointer that has memory allocated to it dynamically, it's crucial to have a destructor to release that memory when the object is destroyed to prevent memory leaks.

In a switch-case structure in C++, the conditions or cases must be of an integer or enumeration type. Floating-point and boolean values cannot be used as cases.

In a for loop, if the condition is omitted, it's treated as always true. Therefore, the loop will execute indefinitely unless there's a break statement or some external factor that interrupts its execution.

Direct recursion occurs when a function calls itself directly, whereas indirect recursion involves a function calling another function that eventually calls the original function. It's a cycle of calling between two or more functions.

When working with binary files in C++, the ios::binary mode is often paired with another mode to specify the operation, such as ios::out for writing or ios::in for reading. This ensures that the file is treated as a binary file.

To execute a loop for a specific number of times using an iterator, a common approach is to use a for loop. You initialize the iterator before the loop starts, use the loop's condition to check against the container's end iterator, and increment the iterator within the loop's iteration expression.

A destructor is a special member function of a class that is executed whenever an object of that class goes out of scope or is explicitly destroyed. Its primary role is to release any resources that the object may have acquired during its lifetime.

The close function is used in conjunction with file streams in C++ to close an open file. It's crucial to close files after operations to release system resources and ensure that all changes, if any, are flushed and saved appropriately to the file system.

A catch block with an ellipsis (...) is used to catch all exceptions, irrespective of their type. This can be useful when you want to ensure that no exceptions go unhandled, but it's often a good practice to handle specific exceptions with their respective catch blocks.

The break statement in C++ is used to terminate the loop, irrespective of whether the loop's condition has been met or not. This can be useful when a certain condition, separate from the loop's terminating condition, is met and the loop needs to end prematurely.