C++ strTok implementation returning weird characters - character

Question

I'm currently working on a string tokenizer in C++ and am getting a strange result.
char *mystrtok(char *str, const char *delim)
{
char * LeftOver;
bool lastToken;
int i=0;
if(str != NULL)
{
LeftOver = str;
lastToken = false;
}else
{
str = LeftOver;
}
for(i = 0; str[i] != '\0'; i++)
{
for(int j=0; delim[j] != '\0'; j++)
{
//If I take out this line then it returns weird characters
cout << "\tstr[" << i <<" ]" << "=" << str[i] << endl;
if(LeftOver[i] == delim[j])
{
str[i] = '\0';
LeftOver = str + i+1;
return str;
}
}
}
if(LeftOver[i] == '\0' && !lastToken)
{
lastToken = true;
return str;
}
return NULL;
}
What's really weird is that if I take out the cout then it returns weird characters
Any idea what could be causing this?
Here's a sample output
//passed
"ls -l -a | wc -c >> myfile"
returned: ls
▒M.▒

Answer 1

I saw several problems with this code, first
str = LeftOver;
At this line, LeftOver has not been initialized at all. But you use it to initialize str. You want to make LeftOver static?
Second, your test for LastToken,
if(LeftOver[i] == '\0' && !lastToken)
It will aways true for !lastToken since before this line it is always false, you want to make it static too?