On Dec 1, 2007 5:27 PM, Michael Sullivan <[EMAIL PROTECTED]> wrote:
> I know that a segmentation fault is the equivalent of a null pointer
> exception in Java, but I don't understand why it's happening here. My
> full code is posted at
> http://www.espersunited.com/~michael/needhelp.txt . Basically the
> problem is this:
A segmentation fault can mean you are accessing memory you have no
permission to use, like if you are trying to access memory you have
not allocated (null pointer).
I didn't go through all of your code but a few things stuck out at me.
One thing I recommend is to stop using char * or char[] and use the
C++ string class, it'll eliminate some headaches with strings.
Also, instead of using a plain old array in your battle class, I'd use
a vector or or a list or similar kind of C++ container class, they are
a lot more flexible than plain old arrays, especially when it comes to
adding more entries into it.
Definitely learn how to use a C++ debugger... if using gdb isn't up
your alley, get Eclipse, KDevelop or Anjuta (I am assuming you are on
Linux) and use their graphical debuggers (which probably use gdb
underneath).
> class battle
> {
> private:
> Ally party[4];
> };
>
> battle::battle()
> {
> party[0] = Ally("Michael", 10, 7);
> party[1] = Ally("Amy", 8, 13);
> party[2] = Ally("Feli", 12, 15);
> party[3] = Ally("Imp", 9, 4);
> }
>
> class Ally : public Character
> {
> public:
> Ally(){}
> Ally(char*, long, long);
> ~Ally();
> };
>
> Ally::Ally(char* myname, long h, long m) : Character(myname, h, m)
> {
> printf("Arrived in Ally constructor for %s.\n", myname);
> }
>
> Character::Character(char *myName, long myMaxHP, long myMaxMP)
> {
> strcpy(name,myName);
> maxHP = myMaxHP;
> maxMP = myMaxMP;
>
> currentHP = maxHP;
> currentMP = maxMP;
> }
>
> Now I've tracked the SegFault down to the battle constructor,
> specifically the line where the 'Amy' Ally is being created. The
> program enters the Ally constructor, and then SegFaults. I have very
> little experience with gdb and ddd doesn't work at all. Can anyone see
> the problem with this? Am I out of stack space? Do I need to start
> using the heap?
>
>
>
>
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