uses crt;
const n=5; m=4;
var a:array[1..n,1..m]of integer;
i,j,l,k:integer;
begin
clrscr;
randomize;
writeln('Исходный массив');
for i:=1 to n do
begin
for j:=1 to m do
begin
a[i,j]:=random(100);
write(a[i,j]:3);
end;
writeln;
end;
writeln('L K-> ');
readln(l,k);
for j:=1 to m do
begin
b:=a[k,j];
a[k,j]:=a[l,j];
a[l,j]:=b;
end;
for i:=1 to n do
begin
for j:=1 to m do write(a[i,j]:3);
writeln;
end;
readln;
end.