const char * vs char[]

[Massimiliano Cialdi <cialdi@firenze.net>]

I have this:

#include <stdio.h>
const char *str = "pippo";
int main(void)
{
  void stampa(char s[]);
  stampa(str);
  return 0;
}
void stampa(char s[])
{
 printf("%s\n", s);
}

and gcc gives me a warning:
pippo.c:9: warning: passing arg 1 of `stampa' discards qualifiers from
pointer target type


what are the differences between char[] and const char *?

thanks

-- 
Massimiliano Cialdi
cialdi@firenze.net
m.cialdi@oksys.it