Паскаль (I семестр) / K02-172 / 04 / stack_st

program stack_static;
(*
(c) 2005 Dima Zolotukhin aka 'Zlogic' <zlogic@gmail.com>
Redistributable under GNU GPL license
*)

const
MAX_STACK = 10;

type
str_message = string[70];
stack = record
data:array[1..MAX_STACK]of integer;
length:byte;
end;

procedure print_menu;
begin
writeln;
writeln('Њ…Ќћ „€ЌЂЊ€—…‘ЉЋѓЋ ‘’…ЉЂ');
writeln('1 „®Ў ўЁвм н«Ґ¬Ґ­в');
writeln('2 ‚лв йЁвм н«Ґ¬Ґ­в');
writeln('3 ‚л室');
end;

function get_int(message:str_message):integer;
var
response:integer;
begin
write(message,'> ');
readln(response);
get_int:=response;
end;

function push(var _stack:stack;data_to_add:integer):boolean;
begin
if _stack.length<MAX_STACK then{Ґб«Ё ¤«Ё­  б⥪  ­Ґ ¬ ЄбЁ¬ «м­ }
begin
_stack.length:=_stack.length+1;{㢥«ЁзЁў Ґ¬ ¤«Ё­г}
_stack.data[_stack.length]:=data_to_add;{¤®Ў ў«пҐ¬ н«Ґ¬Ґ­в ў Є®­Ґж}
push:=true;
end
else{Ё­ зҐ}
push:=false;{®иЁЎЄ }
end;

function pop(var _stack:stack;var data_out:integer):boolean;
begin
if _stack.length>0 then{Ґб«Ё б⥪ ­ҐЇгбв®©}
begin
data_out:=_stack.data[_stack.length];{Ї®«гз Ґ¬ §­ зҐ­ЁҐ}
_stack.length:=_stack.length-1;{㬥­ми Ґ¬ ¤«Ё­г б⥪ }
pop:=true;
end
else{Ё­ зҐ}
pop:=false;{®иЁЎЄ }
end;

var
exit:boolean;
response:byte;
_stack:stack;
x:integer;
begin
exit:=false;
_stack.length:=0;
while not exit do{Ї®Є  ­Ґ ­г¦­® ўл©вЁ}
begin
print_menu;{Ї®Є §лў Ґ¬ ¬Ґ­о}
response:=get_int('‚лЎҐаЁвҐ ў аЁ ­в');{зЁв Ґ¬ ®вўҐв Ї®«м§®ў вҐ«п}
writeln;
case response of
1:if not push(_stack,get_int('‚ўҐ¤ЁвҐ, зв® ¤®Ў ўЁвм ў б⥪'))then{¤®Ў ў«Ґ­ЁҐ н«Ґ¬Ґ­в  ў б⥪}
writeln('<< ‘’…Љ Џ…ђ…ЏЋ‹Ќ…Ќ >>');
2:begin
if pop(_stack,x) then{Ґб«Ё б⥪ ­ҐЇгбв®©}
writeln('Џ®«г祭® Ё§ б⥪ : ',x){ўлў®¤Ё¬ н«Ґ¬Ґ­в}
else{Ё­ зҐ}
writeln('<< ‘’…Љ Џ“‘’Ћ‰ >>');{ўлў®¤Ё¬ error}
end;
3:exit:=true;{ўл室}
end;
end;
end.