In C++, the '/' operator is used for division. If used between two integers, it will perform integer division; with floats or doubles, it performs standard division.

When defining a struct in C++, the compiler will implicitly provide a default constructor if no constructors are explicitly defined. However, it won't automatically provide virtual destructors, overloaded operators, or private members without explicit definitions.

Using the goto statement without careful consideration can lead to "spaghetti code", which is a term for code that is tangled and difficult to follow or maintain due to excessive jumps.

The static_assert mechanism, combined with type traits, allows for compile-time checks. By using static_assert along with type traits like std::is_arithmetic, it's possible to generate clear, intentional compiler errors if a user tries to instantiate a template with a non-numeric type, thus providing instant feedback to the user.

A lookup table can be used to store pre-computed results of complex calculations. By replacing the inner loop's calculations with lookups from this table, one can often achieve significant speedups, especially if the same calculations are being performed repeatedly.

In C++, the this pointer is used within a class's member function to refer to the invoking object of that function. It's an implicit parameter to all member functions and contains the memory address of the current object, allowing for operations on the calling object itself.

In C++, the ampersand (&) is used to denote that a parameter is being passed by reference. This allows the function to directly access and modify the actual argument's memory location.

In modern C++, when considering performance-critical paths, it's beneficial to understand the difference between returning by value and returning by reference or using move semantics. Especially with the advent of Rvalue references in C++11, returning by reference or moving can avoid unnecessary copies and lead to significant performance improvements. Returning by pointer is less idiomatic and might not convey ownership semantics clearly.

In floating-point representation, the number is typically represented as: (-1)^sign * mantissa * (base^exponent). The mantissa is responsible for storing the actual digits of the floating-point number, while the exponent determines the position of the decimal point and the sign determines its sign.

CFront was the first commercially available C++ compiler. It was developed by Bjarne Stroustrup at Bell Labs as a front-end to the C compiler. This compiler played a crucial role in the early evolution and popularization of C++.