Why null-terminated strings? Or: null-terminated vs. characters + length storage

Question

I\'m writing a language interpreter in C, and my string type contains a length attribute, like so:

struct String
{
    char* charac         


        

Answer 1

I think main reason is that standard says nothing concrete about size of any type other than char. But sizeof(char) = 1 and that is definitely not enough for string size.