Re: General method for dynamically allocating memory for a string

rlb@xxxxxxxxxxxxxxxxxxxxxx (Richard Bos) writes:

Frederick Gotham <fgothamNO@xxxxxxxx> wrote:

Randall posted:
if( str2 != NULL ) {
printf( "str2: %s\n", str2 );
} else {
// Setting a null pointer to zero ensures you
// can delete it more than once (free) without
// undefined behavior. This is a good
// programming habit.
str2 = 0;
}

As Richard Heathfield pointed out, both "else" clauses are redundant.

The reasoning given in the comment is also bogus. It is a very _bad_
programming habit to start expecting that you can free pointers twice.

You can free a null pointer any number of times you like. I
think that is what the "it" in "delete it more than once" means.
--
"C has its problems, but a language designed from scratch would have some too,
and we know C's problems."
--Bjarne Stroustrup
.

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