Subj : Re: Problems with delete/free
To   : borland.public.cpp.borlandcpp
From : "Ed Mulroy [TeamB]" <dont_email_me@bitbuc.ket>
Date : Mon Oct 27 2003 04:38 pm

>    /* free memory */
>    free(str);
>
>    printf("String is %s\n", str);

                  ^^^^^^
Wrong.  You just freed the memory whose address is contained in 'str'.  That
memory is no longer valid.

>
> //-----------------------------
>
>    str1 = new char(30); //(char *) malloc(30);

Wrong.  That allocated ONE char with an initial value of decimal 30 (the
same as '\x1E').  To allocate an array of 20 elements, show it as an array
like this:

    str1 = new char[30];

>     delete str1; //free(str1);

Wrong.  You are freeing an array.  The correct syntax is:

       delete []  str1;

I do not guarantee that there are not other problems in that program.  Those
are the ones which were apparent.

..  Ed

> Rob C wrote in message
> news:3f9d8505$1@newsgroups.borland.com...
>
> This is very strange. I wrote a program to test new/delete -
> malloc/free functions. Both sets worked fine as long as
> I “compiled”  the program as a single module. When I built them
> as a project, however, free and delete wouldn’t do
> anything . . . no errors or warnings or anything, but they just
> wouldn’t do anything. I tried all the platforms, but still they
> just wouldn’t do anything. What’s going on?
> ---------------------------------------------------

.