Declare Variables with decltype

decltype(expression) gives you the TYPE of an expression without writing the type yourself. In main, count is an int and price is a double, and count * price is a double, because an int multiplied by a double becomes a double.

Use decltype instead of a written type to declare three new variables:

- copyCount with the type of count, initialized to count * 2 - halfPrice with the type of price, initialized to price / 2 - total with the type of count * price, initialized to count * price

Then print the three variables in that order, one per line. Before you run it, work out each type and value yourself; decimal results print without trailing zeros.