ADA中河內程序的遞歸塔。「在過程調用中不能使用函數」編譯器錯誤
到目前爲止,我認爲我的大部分都是失敗的,我的問題在於我的解決功能。 我想我的算法很好,但我不知道如何實現它進入的功能,我看到使用這個的所有例子都是用在函數內部本身,如: Example
我的錯誤是:
hanoi.adb:23:09: cannot use function "solve" in a procedure call
hanoi.adb:27:09: cannot use function "solve" in a procedure call
hanoi.adb:59:15: missing ")"
這是我的代碼到目前爲止。
with ada.text_io, ada.command_line;
use ada.text_io, ada.command_line;
procedure hanoi is
Argument_Error : EXCEPTION;
max_disks, min_disks : integer := 3;
moves : integer := 0;
verbose_bool : boolean;
function solve (N: in integer; from, to, using: in character) return integer is
begin
if N = 1 then
if verbose_bool = true then
put("Move disk " & integer'image(N) & " from " & character'image(from) & " to " & character'image(to));
end if;
else
solve(N - 1, 'A', 'B', 'C');
if verbose_bool = true then
put("Move disk " & integer'image(N) & " from " & character'image(from) & " to " & character'image(to));
end if;
solve(N - 1, 'B', 'C', 'A');
end if;
moves := (2 ** min_disks) - 1;
return moves;
end solve;
begin
while min_disks /= max_disks loop
IF Argument_Count > 1 THEN
if Argument_Count = 1 then
min_disks := integer'value("Argument(1)");
elsif Argument_Count = 2 then
min_disks := integer'value("Argument(1)");
max_disks := integer'value("Argument(2)");
elsif Argument_Count = 3 then
min_disks := integer'value("Argument(1)");
max_disks := integer'value("Argument(2)");
if argument(3) = "v" or argument(3) = "V" then
verbose_bool := true; -- if argument is V or v it is true
end if;
END IF;
END IF;
IF Argument_Count > 3 THEN
RAISE argument_error;
END IF;
if (max_disks > 0) then
solve (N: integer; from, to, using : character);
END IF;
min_disks := min_disks + 1;
end loop;
EXCEPTION
WHEN Name_Error =>
Put_Line("Please re-enter your arguments, check to see if you entered integers and characters. Max of 3 arguments.");
WHEN OTHERS =>
Put_Line("Please try to not break the program again, thank you.");
end hanoi;
因此,我應該更改in,int。而在char的只是ints/chars?一起擺脫返回聲明?在解決的聲明是。 – Molten