Range checks using a switch statement

Question

My teacher has assigned a program to use both if-else statements and switch statements, so we understand how to implement both. The program asked u

Answer 1

You can not use a double inside a switch. The documentation says:

switch ( expression )
   case constant-expression : statement
   [default   : statement]

The expression must be of an integral type or of a class type for which there is an unambiguous conversion to integral type. Integral promotion is performed as described in Integral Promotions.

On a side note:

There are some compilers (like Clang 3.5.1) which are allowing the case x ... y as an extension to the C++ language. But that too is for an integral datatype. Something like

switch(x){
       case 0:
            cout << "Test1";
            break;
       case 0 ... 9:
            cout << "Test2";
            break;