Trouble with XOR

[DrZoidberg]

So here's my attempt at xoring some data. The heap gets corrupted when XOR is called.

void XOR(char*& data, char*& key, unsigned int datalength, unsigned int keylength, char*& enc_data)
{
enc_data= new char[datalength];
unsigned int keyindex=0;
for (unsigned int a=0; a<datalength; a++)
{
*(enc_data+a)=(*(data+a))^(*(key+keyindex));
keyindex++;
if (keyindex==keylength){keyindex=0;}
}
delete[] data;
}

int main()
{
char* key=new char[3];
*key='a';*(key+1)='b';*(key+2)='c';
char* data=new char[5];
*data='h';*(data+1)='e';*(data+2)='l';*(data+4)='l';*(data+5)='o';
char* enc_data=NULL;
XOR(data, key, 5, 3, enc_data);
delete[] key;
delete[] enc_data;
system("pause");
}

As always your help is appreciated

[DrZoidberg]

Replaced all chars with unsigned chars. The problem seems to occur when delete[] data is called.

[cire]

*data='h';*(data+1)='e';*(data+2)='l';*(data+4)='l';*(data+5)='o';

Take a close look at this line.

[DrZoidberg]

Thank you cire. How did I not notice that..