This is how you can:

const char *str = "ABCD";

But this is probably impossible?

 void exmpl(const char *str) { str = "ABCD"; } const char *str; exmpl(str);

    2 answers 2

    It is possible both. All literal strings are stored forever.

    But the code is still a bug. To change the value in the called code, you need another pointer level:

     void exmpl(const char **str){ *str = "ABCD"; } const char *str; exmpl(&str);

      The const char *str is a pointer to a constant string , so such assignments are quite acceptable. Now, if you had a declaration for const char * const str , then you would have a constant pointer to a constant string , which cannot be changed after initialization, so only the first option would pass.