đây nha, chúc bạn học tốt!

uses crt;

var N:array[1..1000] of longint;

i,a,s:integer;

begin

clrscr;

write('nhap do dai day so: '); readln(a);

for i:=1 to a do

begin

write('nhap so thu ',i,': '); readln(N[i]);

if N[i]>0 then s:=s+N[i];

end;

write('tong cua cac phan tu duong trong day so la: ',s);

readln;

end.

uses crt;

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

i,n,t:integer;

begin

clrscr;

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

for i:=1 to n do 

  begin

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

end;

t:=0;

for i:=1 to n do 

 if a[i] mod 2=0 then t:=t+a[i];

writeln(t);

readln;

end.

gửi bạn...