sentences:  In the real world, setjmp-longjmp (sjlj) used to be the standard way of exception handling in third party Windows C++ compilers, since the native Structured Exception Handling is not only poorly documented in general but also patented on 32-bit Windows.C99 provides that codice_2 is guaranteed to work only when the destination is a calling function, i.e., that the destination scope is guaranteed to be intact.Jumping to a function that has already terminated by codice_58 or codice_2 is undefined.