1)
var
a:array [1..4] of char; i:integer;
begin
for i:=1 to 4 do
begin
read(a[i]);
end;
for i:=4 downto 1 do
begin
write(a[i]);
end;
<span>end.</span>
<em>// PascalABC.NET 3.2, сборка 1338 от 16.11.2016</em>
begin
var x:=-3.14;
while x<=3.14 do begin
Writeln(x:5:2,' ',sqr(sin(x))+sqr(cos(x)));
x:=x+0.2
end
end.
Результат
-3.14 1
-2.94 1
-2.74 1
-2.54 1
-2.34 1
-2.14 1
-1.94 1
-1.74 1
-1.54 1
-1.34 1
-1.14 1
-0.94 1
-0.74 1
-0.54 1
-0.34 1
-0.14 1
0.06 1
0.26 1
0.46 1
0.66 1
0.86 1
1.06 1
1.26 1
1.46 1
1.66 1
1.86 1
2.06 1
2.26 1
2.46 1
2.66 1
2.86 1
3.06 1
Var a:array[1..20] of integer;
i,k:integer;
begin
for i:=1 to 20 do begin
read(a[i]);
if not odd(a[i]) then k+=1;
end;
writeln(k);
<span>end.</span>