Bài 2: 

#include <bits/stdc++.h>

using namespace std;

long long x,y;

int main()

{

cin >>x>>y;

cout<<x<<" "<<y;

swap(x,y);

cout<<x<<" "<<y;

return 0;

}

program tinh;

uses crt;

var a;b:integer;

   C:real;

begin

  clrscr;

write('ban hay nhap so nguyen a,a='); read(a);

write('ban hay nhap so nguyen b,b='); read(b);

C=a*b/2;

write('gia tri bieu thuc C la,C=',C);

delay(5000);

end.

Uses crt;

var n,i,x,u: integer;

begin clrscr;

readln(n);

for i:=1 to n do begin

readln(x);

u:=u+x;

end;

writeln(u);

readln;

end.

program TongCacSoNguyen;

var
  N, i, soNguyen, tong: integer;

begin
  // Nhập số lượng N
  write('Nhap so luong N: ');
  readln(N);

  // Khởi tạo tổng
  tong := 0;

  // Nhập và tính tổng các số nguyên
  for i := 1 to N do
  begin
    write('Nhap so nguyen thu ', i, ': ');
    readln(soNguyen);
    tong := tong + soNguyen;
  end;

  // In ra màn hình tổng
  writeln('Tong cua cac so nguyen la: ', tong);

  readln;
end.

Câu 2:

Program nii;

Uses crt;

Var a,b,c,A:integer;

Begin

Write ('nhap a');

Readln (a);

Write ('nhap b');

Readln (b);

Write ('nhap c');

Readln (c);

A:=a;

If A<b then A:=b;

If A<c then A:=c;

Write ('Ket qua',A);

Readln;

End.

Câu 1

Program ntg;

Uses crt;

Var A,x,y:integer;

Begin

Write ('nhap x');

Readln (x);

Write ('nhap y');

Readln ('y');

A:=x+y;

Write ('Ket qua',A);

Readln;

End.

Bài 1: 

uses crt;

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

i,n,min:integer;

begin

clrscr;

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

for i:=1 to n do 

begin

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

end;

min:=a[1];

for i:=1 to n do 

if min>a[i] then min:=a[i];

writeln(min);

readln;

end.

Bài 2: 

uses crt;

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

i,n,max:integer;

begin

clrscr;

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

for i:=1 to n do 

begin

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

end;

max:=a[1];

for i:=1 to n do 

 if max<a[i] then max:=a[i];

writeln(max);

readln;

end.

program tin_hoc;
uses crt;
var b,c,d,A:realn;
begin
clrscr;
         write('nhap so b');readln(b);
         write('nhap so c');readln(c);
         write('nhap so d');readln(d);
         A:=(b+c)/d;
         writeln('A=');
end.