what's wrong with this code in VC++ 2008 Ex
#include <conio.h>
#include <iostream>
using namespace std;
class Allocate
{
private:
void* v;
unsigned n;
__int8 dummy_ret;
void* Alloc(unsigned& n)
{
void* ret;
if(n == 0)
ret = 0;
else
{
ret = new(nothrow) char[n];
if(ret == 0)
n = 0;
}
return ret;
}
void Free()
{
if(n != 0)
delete [] v;
n = 0;
}
public:
unsigned GetSize()
{
return n;
}
void SetSize(unsigned size)
{
SetData(v,size);
}
void* GetData()
{
return v;
}
void SetData(void* data,unsigned size)
{
if(size == 0)
return;
char* w = (char*)Alloc(size);
for(unsigned i = 0; i < size; i++)
w[i] = ((char*)data)[i];
Free();
v = w;
this -> n = size;
}
__int8& operator [](unsigned i)
{
if(i < n)
return ((char*)v)[i];
else
return dummy_ret;
}
Allocate& operator =(const Allocate& a)
{
SetData(a.GetData(),a.GetSize());
return *this;
}
Allocate& operator ++()
{
SetSize(GetSize() + 1);
return *this;
}
Allocate(unsigned n)
{
v = Alloc(n);
this -> n = n;
}
Allocate(void* w,unsigned size)
{
n = 0;
SetData(w,size);
}
Allocate(const Allocate& a)
{
*this = a;
}
~Allocate()
{
dummy_ret = 0;
Free();
}
};
int main()
{
Allocate a("hello",6);
cout<< a[0];
_getch();
}Error 1 error C2662: 'Allocate::GetData' : cannot convert 'this' pointer from 'const Allocate' to 'Allocate &' g:\important files\my documents\borland studio projects\console.cpp 72
Error 2 error C2662: 'Allocate::GetSize' : cannot convert 'this' pointer from 'const Allocate' to 'Allocate &' g:\important files\my documents\borland studio projects\console.cpp 72
