ecpp03-const.cpp

char * str = "Hello, World!";   // non-const pointer
                                // non-const data                              

const char * p = str;   // non-const pointer
                        // const data
char const * p = str;   // same as above.

char * const p = str;   // const pointer
                        // non-const data 
const char * const p = str;     // const pointer
                                // const data