How to get the length of unsigned char ?

[Pradiptadash]

How to get the length of unsigned char ?
Example
unsigned char uch[] ="welcome";
size_t len = strlen(uch);
its giving the error: "invalid conversion from ‘unsigned char*’ to ‘const char*"
But its ok in case of char
How to resolve that ?

[Banfa]

In C/C++ a character (and therefore a string) always uses char not unsigned char and therefore all the string manipulation functions like strlen are written to accept char *.

The error is how you declare uch it should be declared

char uch[] ="welcome";

You could get rid of the error with a cast in the call to strlen but it would be better to declare uch with the right type in the first place.