On 25-Mar-01 WM wrote:
> I am writing a program like this:
...
>    subtype Binary_Number is Integer range 0..1; --define data type
...
>    function Bin_To_Dec(bin:Binary_Number) return Integer is
...
>          Answer := Answer + a_bin_num(Bin(J))*(2**(J-1));
...
> It gives me a lot of errors... really don't know what's wrong...
> Please give some hints, thanks!

The first error message I get points to Line 16, Character 39 and says:
"array type required in indexed component". The "indexed component" is
"Bin(J)". "Bin" is not an array, it�s an integer (0 or 1). 

The poor naming is the reason of the problems: Rename every occurrence
of "Binary_Number" to "Binary_Digit_Type" and every occurrence of
A_Bin_Num to "Binary_Number_Type" and then look at the function
declaration: Did You really want what is written there?

Wilhelm