Lời giải:

uses crt;

var a:array[1..200]of integer;

i,n,tbc,dem:integer;

begin

clrscr;

write('Nhap n='); readln(n);

for i:=1 to n do 

  begin

       write('A[',i,']='); readln(a[i]);

  end;

writeln('Cac so duong chan la: ');

for i:=1 to n do 

  if (a[i] mod 2=0) and (a[i]>0) then write(a[i]:4);

writeln;

tbc:=0;

dem:=0;

for i:=1 to n do 

  if (-1000<=a[i]) and (a[i]<=1000) then

begin

tbc:=tbc+a[i];

dem:=dem+1;

end;

writeln('Trung binh cong cac phan tu co gia tri trong pham vi tu -1000 den 1000 la: ',tbc/dem:4:2);

readln;

end.