const char*

char const* p2="Mary";   p2 is a pointer to a constant "Mary" p2 can change to point to another constant string, but you can't change the value "May" thru p2. p1 is a constant pointer to "John" p1 can't change, but you can change "John" thru p1.   1 2 3 4 5 6 7 char const* p2 = "Mary"; *p2 = 'C'; // not allowed. p2 = "Margareth"; // allowed char * const p1 = "John"; *p1 = 'C'; // allowed p1 = "Margarth"; // not allowed