, ( ).
if
if, , () . :
if S then A else B;
if S then A;
S , ;
A ( )) , , S ;
B ( )) , , S .
if () . , . . , (True), A, then (), (False), B, else ().
- True, A, False - , , if, , .
if .
:
, :
if S1 then if S2 then A else B;
, if else B, , else () if, else, .
.
case
. , (selection - ), , ( ). :
Case S of
C1: instruction1;
C2: instruction2;
CN: instructionN
else default_instruction_list;
end;
S , ‑ ;
C1, C2, CN , , S, , ();
instruction1, instruction2, , instructionN ( ) , , S;
default_instruction_list , ;( ), , S C1, C2, CN.
:
|
|
|
1) S C1, C2, CN , real.
2) C1, C2, CN , , label goto.
3) , ; , .
4) else default_instruction_list; .
case.
:
Case I of
1..10: Writeln (' ', I:4, ' 1 - 10');
11..20: Writeln (' ', I:4, ' 11 - 20');
21..30: Writeln (' ', I:4, ' 21 - 30')
else Writeln (' ', I:4, ' ')
end;
:
Case I of
1: Z:= I + 10;
2: Z:= I + 100;
3: Z:= I + 1000
end;
:
Var Season: (Winter, Spring, Summer, Autumn);
begin
Case Season of
Winter: Writeln ('Winter');
Spring: Writeln ('Spring');
Summer: Writeln ('Summer');
Autumn: Writeln ('Autumn')
end;
end;
1
,
(x, y) , . , .
2
,
(x, y) , . .
