External environment refers to the major factors and forces outside the organization that have the potential to significantly affect the performance of an organization. External environment is divided into two parts i.e. mega environment or general environment and specific or task environment.
_tcscat is a C function, to concatenate C-style strings; CString is a class (which has built in concatenation via operator+), not a C-style string.
C++ is a superset of C. You can write C code and compile it with the C++ compiler. So for Arduino programming, most projects will be straight C. Library development and more advanced things may prompt you to use C++. Itâs not so simple: Incompatibilities Between ISO C and ISO C++. C and C++ start with the same letter, use semicolon and curly braces, like C#. C and C++ are much more similar.