Reverse C-style String? - C++

Question

I want to use pointers to reverse a char array in C++. I was wondering if there is anything that I should do differently? Am I doing this correctly? Is there a more efficie

Answer 1

void str_reverse( char *str ) {
    char *str_end = strchr( str, 0 );
    std::reverse( str, str_end );
}

if you're supposed to write a loop,

void str_reverse( char *str ) {
    std::size_t len = std::strlen( str );
    for ( std::size_t index = 0; index != len / 2; ++ index ) {
        std::swap( str[ index ], str[ len - index - 1 ] );
    }
}

or, of course, if you can use a C++ string,

void str_reverse( std::string &str ) {
    std::reverse( str.begin(), str.end() );
}