[SOLVED] Passing a char* by reference in C++

Aquarius_Girl · 04-26-2010, 05:48 AM

Below I've presented the declaration, definition and the calling method of a function w.r.t pass by reference:

Declaration

Code:

void getUnpackedMsg (unsigned char &data, unsigned int numberOfBits);

Definition
line 278: Shown in RED

Code:

void packedMessage :: getUnpackedMsg (unsigned char &emptyArray, unsigned int numberOfBits)
{
...
...
printf ("\nAfter unpacking 0: %d ", emptyArray[0]);
}

Calling

Code:

q.getUnpackedMsg (*empty0, 8);

Error Messages:

Code:

workingA.cpp:278: error: invalid types ‘unsigned char[unsigned int]’ for array subscript

Kindly point me the error here !

devnull10 · 04-26-2010, 06:10 AM

Code:

unsigned char &emptyArray ...

should be

Code:

unsigned char *emptyArray ...

Aquarius_Girl · 04-26-2010, 06:14 AM

Thanks for bothering :

I tried that:
Following error occurs then,

Code:

anisha@linux-uitj:~/bitPacking> g++ workingA.cpp
workingA.cpp:251: error: prototype for ‘void packedMessage::getUnpackedMsg(unsigned char*, unsigned int)’ does not match any in class ‘packedMessage’
workingA.cpp:33: error: candidate is: void packedMessage::getUnpackedMsg(unsigned char&, unsigned int)

Aquarius_Girl · 04-26-2010, 07:15 AM

Found the answer here !