Re: pointers and text-based rpg problem

["Jonathan Smith" <jon_1_5@hotmail.com>]

> >char buffer[numfields][51];//buffer to read text;50 +1 for null byte
>
>Here you are allocating a buffer with a NON constant. This buffer will not
>be allocated correctly...

Yeah, I thought about that so I just allocated the first dimension with 20 
and left the second as 51, but it still didn't work.  I see what you're 
doing, and I understand how to use malloc, but I'm still a baby in the C++ 
language, that's part of the reason for creating this game, believe it or 
not, so I have a question about one thing in your code:
What does the double indirection operator do?(when you said "char **buffer;" 
and "buffer = (char **)malloc(sizeof (char*) * numfields);")
Like I said, I see that you're allocating it in Ram and that your alloating 
the first dimension first, and the second dimensions second.  Maybe since 
you're allocating a two dimensional array, that has to do with the double 
use of the indirection operator?  I'm not sure, but thanks.  I know that I 
didn't need the & operator in front of buffer when printing it out.  I was 
having errors and didn't know why so I was just trying something.  I forgot 
it was still in my source code like that ;>). Thanks again

>I would do sumthing like this:
>(C code)
>char **buffer;
>buffer = (char **)malloc(sizeof (char *) * numfields);
>then do somthing like:
>for(c=0;c<numfields;c++)
>{
>	buffer[c] = (char *)malloc(sizeof(char) * 51);

>
> >int i,j;
> >for(i=0;i<3;i++) {
> >strncpy(buffer[i],text,50);
> >}//end for...i loop
> >for(j=0;j<20;j++);{
> >printf("%s \n",&buffer[j]);
>
>In correct indirection for the buffer[j].. as ur printing a string
>you only need buffer[j].
>
>Thats all I can see at the moment.
>Evan,
> >void main() {
> >char test[] ="The Lord is my Shepherd. I shall not want. He maketh me
> >to lie down in green pastures. He leadeth me beside the still waters.
> >He restoreth my soul. He leadeth me in the path of righteousness for
> >His names sake.";
> >tbox(test);
> >}
> >
> >         As I said, this code compiles correctly, but upon the test
> >output of the text in the buffer, it prints only a little ASCII diamond.
> >Anyone's help would be greatly appreciated.
> >         Also, as I am working with C++, the idea of pointers and
> >encapsulation have come to my mind and they seem to step on each other's
> >foot.  For example, if I were to create my own string class like so:
> >
> >class newstring{
> >private:
> >strdata[345];
> >public:
> >char *get(void);
> >}
> >
> >wouldn't the person using this class still be able to change strdata
> >directly, without having to use some function, because of the fact that 
>they
> >have its address?  What I'm saying is, couldn't they just write some
> >characters to that address?  I ask this because the author of my book 
>does
> >it like that, and I'm just wondering if, instead of returning an address 
>to
> >strdata, returning strdata by value would follow the rules of class
> >encapsulation better.  Any and all help and comments are greatly
> >appreciated. Thank you
> >
> >
> >
> >
> >
> >                                      Peace and may God
> >                                       direct your life
> >                                        Amen, Jonathan Smith
> >
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>*Evan Marchant
>*ICQ#15055534
>*"Once one problems solved, ten are around the corner"
>****
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