Const
n = 5;
Var
a: array [1 .. n + 1, 1 .. n] of Real;
mas: text;
i, j: byte;
s, sr1, sr2: Real;
Begin
Assign(mas, 'C:\mymas1.dat');
Reset(mas);
For i := 1 to n do
For j := 1 to n do
Read(mas, a[i, j]);
Writeln('Считанная матрица');
For i := 1 to n do
begin
For j := 1 to n do
Write(a[i, j]:6:2);
Writeln;
end;
s := 0;
For j := n downto n - 2 do
For i := 1 to n do
s := s + a[i, j];
sr1 := s / (3 * n);
s := 0;
For i := 1 to n - 2 do
For j := 1 to n do
s := s + a[i, j];
sr2 := s / (3 * n);
Writeln('sr1:', sr1:6:3);
Writeln('sr2:', sr2:6:3);
Writeln('Полученная матрица');
Rewrite(mas);
if sr1 > sr2 then
for i := 1 to n do
a[i, i] := -a[i, i]
else
for i := 1 to n do
begin
a[n + 1, i] := a[n, i];
a[n, i] := a[n - 1, i];
a[n - 1, i] := a[1, i] + a[n + 1, i];
end;
end.