extern array in qt

[anh5kor]

Hello
I have class where i declared an array and i want to use the value of same array in other class.
I don't want to create any object to access the array .so i tried declare the array as extern.
code as below

class emu
{
UCHAR D0[8];
void decimarconverter(UCHAR *answer)
{
 
for(int i =0;i<=7;i++)
{
    D0[i] =answer[0]%2;
    answer[0] = answer[0]/2;
 qDebug()<<"Binary number is D0"<<D0[i];
}
}
 
class emu1
{
extern UCHAR D0[]
void show()
{
for(int i =0;i<=7;i++)
qDebug()<<D0[i]<<"Value";
}
}

class emu
{
UCHAR D0[8];
void decimarconverter(UCHAR *answer)
{

for(int i =0;i<=7;i++)
{
    D0[i] =answer[0]%2;
    answer[0] = answer[0]/2;
 qDebug()<<"Binary number is D0"<<D0[i];
}
}

class emu1
{
extern UCHAR D0[]
void show()
{
for(int i =0;i<=7;i++)
qDebug()<<D0[i]<<"Value";
}
}

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But i am getting an error
error: 'UCHAR' does not name a type
extern UCHAR D0[];
Can any one let me know why i am getting the error

[wysota]

You need to include the file which defines UCHAR type (it's either a typedef or a macro).

[anda_skoa]

As wysota wrote, your compile error is easy.

But the extern doesn't help you at all here.
emu:0 is a member of emu, each instance of emu has its own. which one would you think that "extern" would refer to?

emu1 is a different class. instances of emu1 can't access private members of emu objects.

Cheers,
_