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.
Call by reference in C++. C++ compiler can use existing C like call by reference as described above. Additionally C++ developers can write call by reference in C++ conversion with &. We are rewriting our call by reference C code in C++ style.