câu 1:
uses crt;
var a: array[1..100] of integer;
i,n,d: integer;
begin
clrscr;
write ('nhap n: '); readln (n);
for i:=1 to n do
begin
write ('nhap phan tu thu ',i,': '); readln (a[i]);
if a[i] mod 2=0 then d:=d+1;
end;
writeln ('trong mang co ',d,' so chan');
readln;
end.
câu 2:
uses crt;
var a: array[1..100] of integer;
i,n: integer;
begin
clrscr;
write ('nhap n: '); readln (n);
for i:=1 to n do
begin
write ('nhap phan tu thu ',i,': '); readln (a[i]);
end;
write ('cac so le trong mang: ');
for i:=1 to n do if a[i] mod 2<>0 then write (a[i],' ');
readln;
end.
câu 3:
uses crt;
var a: array[1..100] of integer;
i,n,s: integer;
begin
clrscr;
write ('nhap n: '); readln (n);
for i:=1 to n do
begin
write ('nhap phan tu thu ',i,': '); readln (a[i]);
if a[i]>0 then s:=s+a[i];
end;
writeln ('tong cac phan tu duong: ',s);
readln;
end.
