problem - pointer arrays to class

[miroslav_karpis]

Hi All,
please can you help me with this? The program works but when I'm exiting the program I'm getting 'assertion error'.

example:

class A
{
public:
    A(int a, int b);   //I'm using one class from Qt that does not have empty constructor

private:
      int a,b;
}

now I want to create 5 pointers of this class in a separate class

class JustATest
{
private:
   A *pClassA[4];

public:
   JustATest();
   void startA() {
                          for (int i=0; i < 5; i++)
                              pClassA[i] = new A(i,55);
                       }
    ~JustATest() {delete [] pClassA}
}

Is the problem in the destructor? I can not use vector because of I have more than one input variables to the class methods.

Any idea would be more than helpful

[Tux0r]

I don't see any assert, so this can't be the relevant code.

[miroslav_karpis]

ok,...maybe I was wrong with the error description. This is the error I'm getting:

*** glibc detected *** /media/Data/01SourceCode/VFST/bin/OCD: free(): invalid pointer: 0x09251434 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb53b9604]
/lib/tls/i686/cmov/libc.so.6(cfree+0x96)[0xb53bb5b6]
.
.
.
.
.
there is a lot more lines (didn't post them)...

[Spidey]

A *pClassA[4];

How many elements do you think this array can hold ?

for (int i=0; i < 5; i++)
    pClassA[i] = new A(i,55);

Surely not 5 ?

delete [] pClassA

Also, since your allocating memory 5 times, you have free it 5 times as well.

for(int i =0; i < 5; i++)
	delete pClassA[i];

[Tux0r]

ok,...maybe I was wrong with the error description. This is the error I'm getting:

*** glibc detected *** /media/Data/01SourceCode/VFST/bin/OCD: free(): invalid pointer: 0x09251434 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb53b9604]
/lib/tls/i686/cmov/libc.so.6(cfree+0x96)[0xb53bb5b6]
.
.
.
.
.
there is a lot more lines (didn't post them)...

Ok that hasn't got anything to do with assert. To solve that problem look at the post above.

[Spidey]

Ok that hasn't got anything to do with assert. To solve that problem look at the post above.

Yeah, although I think I know what he/she is talking about, Visual Studio spits out a cryptic error when you have memory leaks which says

Debug assertion failed: _BLOCK_TYPE_IS_VALID(phead->nBlockUse)

So, Im guess the OP was talking about that, heres what I mean - http://msdn.microsoft.com/en-us/libr...40(VS.60).aspx