/* for ( range_declaration : range_expression ) loop_statement this loop is equivalent to the following expanded code:

{ auto && __range = range_expression; for (auto __begin = __range.begin(), __end = __range.end(); __begin != __end; ++__begin) { range_declaration = *__begin; loop_statement } } */

so what are requirements :

1. begin() and end()
2. operator !=
3. operator ++ (prefix)
4. operator *

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Q. Define your own container class - fixed size container and then define iterator on it such that it satisfies for loop requirement.

Sol. Look class_design/my_container class