-- This program does some simple analysis of the values found in an array.
-- It finds the sum of all of the values, and it
-- counts the number of positive, zero, and negative values
-- It displays the sum and the counts.
-- It also does a little very simple simple error checking.
-- For testing purposes, we fill up the array with some dummy values.
-- It would also be interesting to fill the array with random values,
-- but we'll skip that for now.
--
-- Author: Ned Okie
-- Date: 8/24/2009

with ada.text_io; use ada.text_io; 
with ada.integer_text_io; use ada.integer_text_io; 
 
procedure countPosZeroNeg is
    Num_Ints: 
        constant Natural := 10;   -- Number of elements in the array

    -- A type for our array
    type Int_Array is array (1 .. Num_Ints) of Integer;

    theNums: Int_Array;           -- Array to hold the numbers 

    sum: Integer := 0;            -- Sum of all values in the array

    -- Number of positives, zeros, and negatives in the array
    numPositives, numZeros, numNegatives: Natural := 0;

    count: Natural;                -- Counter for while loop

begin
    -- Put some values into the array
    -- theNums := (5, 0, -4, 9, 0, 3, -9, -77, 22, 11); 
    theNums := (3 => 5, others => 0);

    -- Sum all the elements of the array
    for i in theNums'range loop
        sum := sum + theNums(i);
    end loop;

    -- Now sum and count the positive and negative (and zero)
    -- Use a separate loop just so we can illustrate the while loop
    count := 1;
    while count <= Num_Ints loop
        -- Positives
        if theNums(count) > 0 then
            numPositives := numPositives + 1;

        -- Zeros
        elsif theNums(count) = 0 then
            numZeros := numZeros + 1;

        -- Negatives
        else -- theNums(count) < 0  must be true
            numNegatives := numNegatives + 1;

        end if;

        -- go to next array element
        count := count + 1;

    end loop;

    -- Error Checking
    if numPositives + numZeros + numNegatives /= Num_Ints then
        put_line("ERROR IN COUNTS!!!");
    end if;
    
    -- Print sum and counts 
    put_line("Overall sum:" & sum'img);

    put_line("Number of positives:" & numPositives'img);
    put_line("Number of zeros:" & Natural'image(numZeros));
    put_line("Number of Negatives:" & Integer'image(numNegatives));

end countPosZeroNeg;