Составить программу , которая меняет местами два любых элемента главной диагонали квадратного массива.

t:=arr[1,1];
arr[1,1]:=arr[2,2];
arr[2,2]:=t;

uses crt;
const n=5;
var a:array[1..n,1..n] of integer;
    d,c,i,next,j:integer;
begin
read(d,c);
for i:=1 to n do
for i:=1 to n do
begin
a[i,j]:=random(10);
writeln (a[i,j],' ');
end;
next:=a[d,d];
a[d,d]:=a[i,i];
for i:=1 to n do
for j:=1 to n do
write(a[i,j],' ');
end.

for i:=1 to n do
begin
for j:=1 to m do
write(arr[i]:4);
writeln;
end;

uses crt;
const n=5;
var a:array[1..n,1..n] of integer;
    d,c,i,next,j:integer;
begin
read(d,c);
for i:=1 to n do
for j:=1 to n do
begin
a[i,j]:=random(10);
writeln (a[i,j],' ');
end;
next:=a[d,d];
a[d,d]:=a[i,i];
a[c,c]:= next;
for i:=1 to n do
for j:=1 to n do
write(a[i,j],' ');
begin
for i:=1 to n do
begin
for j:=1 to n do
write(a[i]:4);
writeln;
end;
end;
end.

const 
n=5;
m=5;

uses crt;
const n=5;
var a:array[1..n,1..n] of integer;
    d,c,i,next,j:integer;
begin
read(d,c);
for i:=1 to n do
begin
for j:=1 to n do
begin
a[i,j]:=random(10);
write(a[i,j]:4);
end;
writeln;
end;
writeln;
next:=a[d,d];
a[d,d]:=a[c,c];
a[c,c]:= next;
for i:=1 to n do
begin
for j:=1 to n do
write(a[i,j]:4);
writeln;
end;
end.