Binary file/pointer problem

[vitaut]

char * temp;
const ifstream::pos_type size = 1;

int crypt(string inp, string otp, char key)
{
	ifstream inpf(inp.c_str(), ios::in|ios::binary);
	ofstream otpf(otp.c_str(), ios::out|ios::binary|ios::app|ios::trunc);
	
	while(!inpf.eof()){
		inpf.read(temp, size);
		*temp = key ^ *temp;
		otpf.write(temp, size);
		otpf.flush();
	}
	inpf.close();
	otpf.close();
	delete temp;
	
	return 0;
}

When tried to do "*temp = key ^ *temp;", got "Segmentation fault". What's the matter?

[Duthomhas]

You have to allocate space for temp to point to before you use it.
5 { temp = new char[ size ];

Hope this helps.

[edit]
BTW -- why is temp a global object? Don't do that. ;-)

[vitaut]

Thank you very much, it helped!