Ответ:

var a:array [1..6,1..8] of integer;

i,j,mi,mj:integer;

begin

writeln('Массив: ');

for i:=1 to 6 do

begin

for j:=1 to 8 do

begin

a[i,j]:=random(90)+10;

write(a[i,j]:4)

end;

writeln

end;

writeln;

mi:=1;

mj:=1;

for i:=1 to 6 do

begin

for j:=1 to 8 do

if a[i,j] > a[mi,mj] then

begin

mi:=i;

mj:=j

end

end;

writeln ('max[',mi,',',mj,'] = ',a[mi,mj]);

writeln;

writeln('Массив: ');

for i:=1 to 6 do

begin

for j:=1 to 8 do

begin

if (i=mi) or (j=mj) then a[i,j]:=0;

write(a[i,j]:4)

end;

writeln

end

end.

===== PascalABC.NET =====

begin

 var (m, n) := (6, 8);

 var a := MatrRandom(m, n, -99, 99);

 a.Println(4);

 Writeln;

 var t := a.ElementsWithIndices.MaxBy(p -> p[0]);

 a.SetRow(t[1], ArrFill(n, 0));

 a.SetCol(t[2], ArrFill(m, 0));

 a.Println(4)

end.