why i can not convert a char ** to a const char ** ?

[Steven Woody]

somewhere in my code,

char* rtnStrs[] = { "ok", "error", NULL };
foo( rtnStrs );

here, foo was decleared as 'void foo( const char * rtnStrs[] ).

but the gcc compiler will report ' can not convert from char ** to
const char ** '. i usually know that one can not convert a const to a
non-const, but why here i can not convert a non-const to const ?

thanks.

-
woody

 

[Michael Mair]

somewhere in my code,

char* rtnStrs[] = { "ok", "error", NULL };
foo( rtnStrs );

here, foo was decleared as 'void foo( const char * rtnStrs[] ).

but the gcc compiler will report ' can not convert from char ** to
const char ** '. i usually know that one can not convert a const to a
non-const, but why here i can not convert a non-const to const ?

RTFFAQ: It is only polite to have a look into the FAQ before
posting...

http://c-faq.com/ansi/constmismatch.html

Cheers
Michael