Câu 2: 

a) Mô tả thuật toán

-Bước 1: Nhập n và nhập dãy số

-Bước 2: dem←0; i←1; t←0;

-Bước 3: Nếu a[i] mod 2=0 thì dem←dem+1 và t←t+a[i];

-Bước 4: i←i+1;

-Bước 5: Nếu i<=n thì quay lại bước 3

-Bước 6: Xuất t và dem

-Bước 7: Kết thúc

Câu 2: 

b) uses crt;

var a:array[1..100]of integer;

i,n,t,dem:integer;

begin

clrscr;

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

for i:=1 to n do 

begin

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

end;

t:=0;

dem:=0;

for i:=1 to n do 

 if a[i] mod 2=0 then 

begin

t:=t+a[i];

inc(dem);

end;

writeln('So so chan la: ',dem);

writeln('Tong cac so chan la: ',t);

readln;

end.

Program HOC24;

var i,n,k,d: integer;

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

begin

readln(n,k);

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

d:=0;

for i:=1 to n do if a[i]=k then d:=d+1;

write(d);

readln

end.

progam bai1;

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

i,n,dem1,dem2 : integer ;

begin

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

writeln('Nhap gia tri cua cac phan tu');

for i:= 1 to n do

begin

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

end;

dem1:=0; dem2:=0;

for i:= 1 to n do

begin

if a[i]>0 then dem1:=dem1+1;

if a[i]>0 then dem1:=dem2+1;

end;

write('Cac so nguyen am trong day la:',dem1);

writeln;

write('Cac so nguyen am trong day la:',dem2);

readln;

end.

#include <bits/stdc++.h>

using namespace std;

long long x,n,i,dem;

int main()

{

cin>>n;

dem=0;

for (i=1; i<=n; i++)

{

cin>>x;

if (x%2==0) dem++;

}

cout<<dem;

return 0;

}

Câu 1:

var a:array[1..100]of integer;

Câu 2: 

uses crt;

var a:array[1..10]of integer;

i:integer;

begin

clrscr;

for i:=1 to 10 do 

  begin

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

end;

for i:=1 to 10 do 

 write(a[i]:4);

readln;

end.

Câu 3: 

uses crt;

var a:array[1..15]of integer;

i,n,t:integer;

begin

clrscr;

repeat

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

until (0<n) and (n<=15);

for i:=1 to n do 

begin

repeat

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

until a[i]<=100;

end;

writeln('Mang da nhap la: ');

for i:=1 to n do 

  write(a[i]:4);

writeln;

t:=0;

for i:=1 to n do

if a[i] mod 3=0 then t:=t+a[i];

writeln('Tong cac phan tu chia het cho 3 la: ',t);

writeln('Cac so chan o vi tri le trong day la: ');

for i:=1 to n do 

  if (a[i] mod 2=0) and (i mod 2=1) then write(a[i]:4);

readln;

end.

#include <bits/stdc++.h>

using namespace std;

int n,kt,t;

int main()

{

cin>>n;

int t=0;

for (int i=1; i<=n; i++)

if (i%2==1) cout<<i<<" ";

cout<<endl;

for (int i=2; i<=n; i++)

{

kt=0;

for (int j=2; j*j<=i; j++)

if (i%j==0) kt=1;

if (kt==0) cout<<i<<" ";

}

return 0;

}

Câu 1: 

uses crt;

var s,i:integer;

begin

clrscr;

s:=0;

for i:=1 to 10 do 

  s:=s+i;

writeln('Tong cua 10 so tu nhien dau tien la: ',s);

readln;

end.

Câu 2: 

uses crt;

var a:array[1..100]of integer;

i,n,dem:integer;

begin

clrscr;

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

for i:=1 to n do 

  begin

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

end;

dem:=0;

for i:=1 to n do

if a[i]>0 then inc(dem);

writeln('So luong phan tu duong la: ',dem);

readln;

end.

Câu 3: 

uses crt;

var i,j:integer;

begin

clrscr;

for i:=1 to 9 do 

  begin

      writeln('Bang nhan ',i,' la: ');

for j:=1 to 10 do 

  writeln(i,'*',j,'=',i*j);

delay(200);

end;

readln;

end.

Câu 6:

uses crt;

var n,i:integer;

begin

clrscr;

readln(n);

for i:=1 to n do 

if n mod i=0 then write(i:4);

readln;

end.

5:

uses crt;

var n,i,dem:integer;

begin

clrscr;

readln(n);

dem:=0;

for i:=0 to n do

if i mod 2=1 then 

begin

write(i:4);

dem:=dem+1;

end;

writeln;

writeln(dem);

readln;

end.

1:

#include <bits/stdc++.h>

using namespace std;

long long a[100],i,n;

int main()

{

cin>>n;

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

cout<<"Day ban dau la: "<<endl;

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

cout<<endl;

sort(a+1,a+n+1);

cout<<"Day tang dan la: "<<endl;

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

return 0;

}