составить проект занятия по теме: Алгоритмы

Program n1;
var a,b,sum,pr:integer;
begin
sum:=0;
pr:=1;
for a:=1 to 10 do begin
sum:=sum+a;
end;
writeln('сумма чисел от 1 до 10 = ',sum);
for a:=1 to 10 do begin
pr:=pr*a;
end;
writeln('произведение чисел от 1 до 10 = ',pr);
end.

program n2;
var a,b,n:integer;
begin
writeln('введите степень n');
readln(n);
b:=1;
for a:=1 to n do begin
b:=b*2;
end;
writeln('2 в ',n,' степени = ', b);
end.

program n3;
var sum,a,n,n2:integer;
begin
writeln('введите число n');
readln(n);
n2:=n;
while n<>0 do begin
a:=n mod 10;
sum:=a+sum;
n:=n div 10;
end;
writeln('сумма цифр ',n2,' = ',sum);
end.

//4)
var
  x1, y1, x2, y2, x3, y3, x4, y4: integer;
  s, sc: real;

function linelength(x1, y1, x2, y2: integer): real;
begin
  linelength := sqrt(sqr(x2 - x1) + sqr(y2 - y1));
end;

procedure ger(a, b, c: real);
var
  p: real;
begin
  p := (a + b + c) / 2;
  sc := sqrt(p * (p - a) * (p - b) * (p - c));
end;

begin
  write('1:');readln(x1, y1);
  write('2:');readln(x2, y2);
  write('3:');readln(x3, y3);
  write('4:');readln(x4, y4);
  ger(linelength(x1, y1, x2, y2), linelength(x2, y2, x3, y3), linelength(x1, y1, x3, y3));
  s := s + sc;
  ger(linelength(x1, y1, x4, y4), linelength(x4, y4, x3, y3), linelength(x1, y1, x3, y3));
  s := s + sc;
  writeln(s);
end.
//3)
var
  a, b, c: integer;

function sce(var a: integer): integer;
var
  sc, c: integer;
begin
  while a <> 0 do
  begin
    c := a mod 10;
    a := a div 10;
    sc := sc + c;
  end;
  sce := sc;
end;

begin
  read(a, b, c);
  if (sce(a) > sce(b)) and (sce(a) > sce(c)) then writeln(a) else
  if (sce(b) > sce(a)) and (sce(b) > sce(c)) then writeln(b) else
  if (sce(c) > sce(a)) and (sce(c) > sce(b)) then writeln(c) else
  if (sce(c) = sce(a)) and (sce(a) = sce(b)) then writeln('Равны');
end.