, . 3 : , .
, Begin End. , .
:
Begin
1;
N;
End;
, . : If Case.
If :
1. If Then 1 { }
Else 2;
2. If Then ; { }
If, If. . . . .
, 1, 2. , , , If.
If If. :
If Then
If Then 1
Else 2;
Else Then, .
:
If ((A > B) And (C < D))
Then
If (Z >= X) Then Writeln ( )
Else Writeln ( )
Else
WriteLn ( );
Case If . , , , ( ). If, Else, . :
ase - of
1: 1;
2: 2;
...
N: N
Else
End;
ase , -. , ase , nd, , Else.
- . , .
|
|
|
:
Case X of {- }
1,2,3: A:= B + C;
4: A:= B - C;
5..9: A:= B*C
Else A:= B/C
End;
Case CH of {- }
A..Z: WriteLn ( );
0..9: WriteLn ( )
End;
, . , for, , repeat while.
for . :
1. for _:= _ to _ do
;
2. for _:= _ downto _ do
;
. for , .
, . , . for to , for downto . for , .
: 0 100.
Program DemoFor;
Var
I, Sum: integer;
Begin
Sum:= 0;
For i:=0 to 100 do
Sum:= Sum + I;
WriteLn ( , Sum);
End.
repeat (Repeat), (Until).
:
Repeat
1;
...
n
Until ;
. , Repeat Until, . , . False, , True .
repeat :
, , ;
False;
Begin...End.
: 0 100.
Program DemoRepeat;
Var
I, Sum: integer;
Begin
I:= 2;
Sum:= 0;
Repeat
Sum:= Sum + I;
I:= I + 2
Until (I >100);
WriteLn ( , Sum);
End.
While Repeat, .
:
While do ;
, . . True, . False, while . False, .
For, While, Repeat , .. .
|
|
|
:
Break ;
Continue .
: 0 100.
Program DemoWhile;
Var
I, Sum: integer;
Begin
I:= 2;
Sum:= 0;
While I <= 100 do
Begin
Sum:= Sum + I;
I:= I + 2
End;
WriteLn ( , Sum);
End.
