mình cũng cần ạ

a)

Input: Số nguyên dương N, dãy số a1,a2,a3,...,an

Output: Tổng các số chẵn nhỏ hơn hoặc bằng N

b)

Program HOC24;

var i,n: integer;

t: longint;

a: array[1..1000] of integer;

f1,f2: text;

const fi='SONGUYEN.TXT';

fo='SOCHAN.TXT';

begin

assign(f1,fi);

assign(f2,fo);

reset(f1);

rewrite(f2);

readln(f1,n);

for i:=1 to n do read(f1,a[i]);

for i:=1 to n do if (a[i] mod 2=0) and (a[i]<=n) then

begin

write(f2,a[i],' ');

t:=t+a[i];

end;

writeln(f2);

write(f2,t);

close(f1); close(f2);

end.

#include <bits/stdc++.h>

using namespace std;

long long i,a[100],n;

int main()

{

freopen("songuyen.txt","r",stdin);

n=20;

for (i=1; i<=n; i++) cin>>a[i];

for (i=1; i<=n; i++) cout<<a[i]<<" ";

return 0;

}

ai giup e voi dc k ah:( đang thi ạ

alo mng ơi=(((

const fi='songuyen.txt';
fo='sochan.txt';
var f1,f2:text;
a:array[1..100]of integer;
i,dem:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
dem:=0;
while not eof(f1) do
begin
inc(dem);
readln(f1,a[dem]);
end;
for i:=1 to dem do
if a[i] mod 2=0 then write(f2,a[i]:4);
close(f1);
close(f2);
end.

const fi='songuyen.txt';
fo='sole.txt';
var f1,f2:text;
n,i,t:integer;
a:array[1..100]of integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eoln(f1) do
begin
inc(n);
read(f1,a[n]);
end;
t:=0;
for i:=1 to n do
if a[i] mod 2=1 then t:=t+a[i];
writeln(f2,t);
close(f1);
close(f2);
end.

#include <bits/stdc++.h>

using namespace std;

long long m,n,t,i;

int main()

{

freopen("dulieu.inp","r",stdin);

freopen("ketqua.out","w",stdout);

cin>>m>>n;

t=0;

for (i=m; i<=n; i++)

if (i%2!=0) t+=i;

cout<<t;

return 0;

}

Program HOC24;

const fi='SONGUYEN.TXT';

fo='KETQUA.TXT';

var n,i,d:integer;

a: array[1..32000] of integer;

function nt(x: integer): boolean;

var j: integer;

begin

nt:=true;

if (x=2) or (x=3) then exit;

nt:=false;

if (x=1) or (x mod 2=0) or (x mod 3=0) then exit;

j:=5;

while j<=trunc(sqrt(x)) do

begin

if (x mod j=0) or (x mod (j+2)=0) then exit;

j:=j+6;

end;

nt:=true;

end;

procedure ip;

begin

assign(f,fi);

reset(f);

readln(f,n);

for i:=1 to n do read(f,a[i]);

close(f);

end;

procedure out;

begin

assign(f,fo);

rewrite(f);

d:=0;

for i:=1 to n do

if nt(a[i]) then inc(d);

write(f,d);

close(f);

end;

begin

ip;

out;

end.

Program HOC24;

var i,n: integer;

t: longint;

f1,f2: text;

begin

assign(f1,'BAI1.INP');

reset(f1);

read(f1,n);

t:=0;

for i:=1 to n do if i mod 2=0 then t:=t+i;

close(f1);

assign(f2,'BAI1.OUT');

rewrite(f2);

write(f2,t);

close(f2);

end.