The -> (Arrow) operator is used in C++ to access members of an object or struct through a pointer. For instance, if you have a pointer to a struct ptr and want to access its member x, you can do so using ptr->x.

John wrote the function implementation within the header file. The function implementation contains the actual logic and code that defines how the function performs its task. Writing the entire logic in the header file is not a typical practice and may lead to code organization issues.

Sarah should share the Function Declarations with others. Function Declarations provide information about the name, parameters, and return type of a function without revealing the actual implementation details. This allows users of the library to understand how to use the functions without being concerned about their internal workings.

Robert should use "Function Overloading" to write a function that can accept either two or three parameters. Function overloading allows him to define multiple functions with the same name in the same scope but with different parameter lists. The compiler will then determine which function to call based on the number or types of arguments passed to it. This flexibility enables Robert to create a single function name with different parameter options.

In programming, a "while" statement is a control structure that creates a loop. It repeatedly executes a block of code as long as a specified condition remains true. This is useful for scenarios where you want to perform an action multiple times until a certain condition is met.

Inline functions are expanded at the calling point. When you use the inline keyword, the compiler replaces the function call with the actual function code at the location where the function is called, reducing the overhead of a traditional function call.

The possible reason for Maria's function sometimes using the default value and other times using the value she provides is an Incorrect Function Call. If she calls the function without providing an argument for the parameter with the default value, it will use the default value. However, if she explicitly provides an argument, the provided value will be used.

When a function calls itself as its last operation before returning, it's called 'tail recursion.' Tail recursion is often optimized by compilers, making it an efficient way to implement certain algorithms, like calculating factorials or traversing data structures.

It assigns the default value specified in the function declaration. When a function argument with a default value is not provided in a function call, the compiler assigns the value specified in the function's declaration. This behavior ensures that functions can be called with missing arguments.

The reason behind two different cases executing sequentially without a break is most likely missing break statements within the cases. In a switch-case structure, if a break statement is omitted, execution will "fall through" to the next case. Robert should ensure that each case has the appropriate break statement to exit the switch statement after execution.