program TinhTong;
uses crt;
var
  N, i, j, tich: integer;
  S: real;
begin
  clrscr;
  write('Nhap so nguyen N: ');
  readln(N);
  
  S := 0;
  tich := 1;
  
  for i := 1 to N do
  begin
    tich := tich * i;
    S := S + tich;
  end;
  
  writeln('Tong S = ', S:0:2);
  readln;
end.

Program HOC24;

var i,n: integer;

t: longint;

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

begin

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

for i:=1 to n do

begin

write('Nhap so thu ',i,': '); readln(a[i]);

end;

t:=0;

for i:=1 to n do t:=t+a[i];

write('Tong la; ',t);

readln

end.

Program HOC24;

var i: byte;

t: integer;

begin

t:=0;

for i:=25 to 50 do if (i mod 5=0) and (i mod 2=1) then t:=t+i;

write('Tong la: ',t);

readln

end.

uses crt;
var i,j,m:integer;
t:longint;
a:array[1..100,1..100]of integer;
begin
  clrscr;
  write('nhap m:');readln(m);
  for i:=1 to m do
  for j:=1 to m do
  begin
    write('a[',i,',',j,']=');readln(a[i,j]);
  end;
  clrscr;
  writeln('ma tran da nhap la:');
  for i:=1 to m do
  begin
    for j:=1 to m do
    write(a[i,j]:5);writeln;
  end;
  i:=1;j:=1;
  while i<=m do
  begin
    t:=t+a[i,j];
    inc(i);inc(j);
  end;
  writeln('tong cac phan tu nam tren duong cheo chinh la: ',t);
  readln;
end.

Program HOC24;

var t: longint;

n,i: integer;

begin

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

t:=1;

for i:=1 to n do t:=t*i;

write(n,'! =',t);

readln

end.

#include <bits/stdc++.h>

using namespace std;

double a,cv,dt;

int main()

{

cin>>a;

cv=a*4;

dt=a*a;

cout<<fixed<<setprecision(2)<<cv<<endl;

cout<<fixed<<setprecision(2)<<dt;

return 0;

}

program hinhtron;

var r:real;

const pi=3.14;

begin

clrscr;

Write('Nhapbankinh:');readln(r);

Writeln('Dientichhinhtronla:',pi*r*r);

readln

end.

1:

#include <bits/stdc++.h>

using namespace std;

long long n=10, a[10],i,nn;

int main()

{

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

nn=a[1];

for (i=2; i<=n; i++) nn=min(nn,a[i]);

cout<<nn;

return 0;

}

Có tính chu vi tg từ a vs h à?
Var a,h:real; 
begin
Writeln('nhap do dai duong cao: '); Readln(h);
Writeln('nhap do dai canh day: '); readln(a);
Writeln('dien tich tam giac: S= ', (a*h)/2);
end.