BSS macro, or Fundamental String Substitution macro, is a preprocessor macro within the C programming language that enables for straightforward alternative of strings in code. It’s outlined utilizing the `__STDC_VERSION__` macro and takes the next type:
`__STDC_VERSION__` is a preprocessor macro that specifies the model of the C customary that the compiler is utilizing. The `__STDC_VERSION__` macro is outlined within the “ header file.