this pointer becomes NULL

hi,

I get segmentation fault when returning from member functions.
In member function i just change the value of a class variable and come back to the calling function.
When i debug the code in the gdb, the this pointer in the calling function is null after i execute the called function and come back.
How do i fix this problem???

regards
bbr

If the 'this' pointer is NULL it means the class hasn't been instantiated. This is commonly caused by having a pointer to your class and not using new to instantiate it but the function is still available in memory so can be called.

-KM-

hi
the code is as below
class a
{
public:
int status;

void mfunc1();
void mfunc2();

}

void a::mfunc1()
{
status=true;
}

void a::mfunc2()
{
mfunc1();
if(status==true) <....................................... after it executes mfunc1 ; status become inaccessible and i get segmentation fault /......why?
{
....
....................
}
}
main()
{
a *ptr;
ptr=new a();
ptr->mfunc2;
}

i'm not that well versed with c/c++...

i'd just like to ask why you declared status as 'int' if it would be used as a 'boolean'?

just curious...