Error C2440: Cannot convert from char * to char []

[DeelanMJ]

Hi,

I'm trying to split a string using strtok(), using this code snippet as a guide:

char str[] ="- This, a sample string.";
char * pch;
printf ("Splitting string \"%s\" into tokens:\n",str);
pch = strtok (str," ,.-");
while (pch != NULL)
{
    printf ("%s\n",pch);
    pch = strtok (NULL, " ,.-");
}
return 0;

And the code I have is:

char str[] = txt;      // sample value is T,-123,-456,-789
char * pch;  
		
pch = strtok (str,",");

while (pch != NULL)
{
	sds_printf(pch);
}

return 0;

But after I compiled the code, C++ returned a C2440: "Cannot convert from char * to char []" at the char str[] = txt line. I'm having a hard time figuring it out, as I'm relatively new to C++. Can somebody tell me what I did wrong here?

Thanks in advance.