1) Не достаточно информации
2)
Program help1;
Uses Crt;
Var a : Array[1..3, 1..3] of Integer;
i, j, m : Integer;
Begin
ClrScr;
For i := 1 to 3 do
For j := 1 to 3 do
Begin
Write('Введи a[', i, ', ', j, ']: ');
Readln(a[i, j]);
End;
If a[1, 1] > 0 then
m := 4;
If a[1, 1] < 0 then
m := 7;
For i := 1 to 3 do
For j := 1 to 3 do
a[i, j] := a[i, j] * m;
End.
3)
Program help2;
Uses Crt;
Var s : String;
n, i : Byte;
Begin
ClrScr;
Write('Введи строку: ');
Readln(s);
n := 0;
For i := 1 to Length(s) do
if s[i] = '5' then
inc(n);
Write('Цифра 5 встречается ', n, ' раз');
End.
program Rand1;
var
A: array [1..5] of Integer;
i: Integer;
begin
Randomize;
for i := Low (A) to High (A) do begin
A [i] := Random (3) - 1;
WriteLn (A [i] :3)
end;
ReadLn;
end.
program Rand2;
var
A: array [1..7] of Double;
i: Integer;
begin
Randomize;
for i := Low (A) to High (A) do begin
A [i] := Random (100001) / 100000 + 3;
WriteLn (A [i] :8 :2)
end;
ReadLn;
end.
program Rand3;
var
A: array [1..10] of Integer;
i: Integer;
begin
Randomize;
for i := 1 to 10 do begin
A [i] := Random (21) + 20;
WriteLn (A [i], ' ');
end;
ReadLn;
end.
program Read4;
var
A: array [1..7] of Integer;
i: Integer;
begin
for i := Low (A) to High (A) do begin
Write ('Введите ', i, ' число: ');
ReadLn (A [i]);
end;
for i := High (A) downto Low (A) do
Write (A [i], ' ');
ReadLn;
end.
