tham khảo

Program bt_3;

Uses crt;

Var Tong, n, i: integer;

Begin

 Clrscr;

 Writeln(‘nhap n=’);

 Readln (n);

 Tong:=0;

 For i:=1 to n do

 If I mod 2 = 1 then Tong:= Tong+i;

 Writeln(‘Tong la:’,Tong);

 Readln

End.

uses crt;

var n,m,i,t:integer;

begin

clrscr;

readln(n,m);

t:=0;

for i:=n to m do t:=t+i;

writeln(t);

readln;

end.

Câu 1: 
uses crt;
var s,i,n:integer;
begin clrscr;
s:=0;
write('Nhap n: ');readln(n);
for i:=1 to n do
if i mod 2 <> 0 then inc(s,i);
write('Tong cac so le tu 1 den ',n,' la: ',s);
readln
end.

Câu 2:
uses crt;
var s,i,n:integer;
begin clrscr;
s:=0;
write('Nhap n: ');readln(n);
for i:=1 to n do
if i mod 2 = 0 then inc(s,i);
write('Tong cac so le tu 1 den ',n,' la: ',s);
readln
end.

Bài 2: 

#include <bits/stdc++.h>;

using namespace std;

int main();

{

long m,n;

cout<<"Nhap m="; cin>>m;

cout<<"Nhap n="; cin>>n;

cout<<m*n-2;

return 0;

}

Câu 1:

program Tinhtong:

var

     n, i, sum: integer;

begin

     write('Nhap n: ');

     readln(n);

     sum := 0;

     for i := 2 to n do

     begin

          if i mod 2 = 0 then

          begin

               sum := sum + i;

          end;

     end;

     writeln('Tong cac so chan tu 2 toi ', n, ' la ', sum);

     readln; 

end.

Câu 2:

program Tinhtong:

var

     n, i, sum: integer;

begin

     write('Nhap n: ');

     readln(n);

     sum := 0;

     for i := 1 to n do

     begin

          if i mod 2 = 1 then

          begin

               sum := sum + i;

          end;

     end;

     writeln('Tong cac so le tu 1 toi ', n, ' la ', sum);

     readln;

end.

uses crt;

var m,n,t,i:integer;

begin

clrscr;

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

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

t:=0;

for i:=m to n do 

  if i mod 2=0 then t:=t+i;

writeln('Tong cac so chan tu ',m,' den ',n,' la: ',t);

readln;

end.

Program Tin;

Uses crt;

Var i,n:integer

      a:array[1..1000] of integer;

Begin

clrscr;

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

Writeln('Nhap ',n,' so nguyen:');

For i:= 1 to n do 

Begin

Write('A[',i,'] = ');

readln(a[i]);

End;

Writeln('Cac so chan co trong day la:');

For i:= 1 to n do If a[i] mod 2 = 1 then write(a[i],'  ');

Readln;

End.

uses crt;

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

i,m:integer;

begin

clrscr;

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

for i:=1 to m do 

  begin

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

end;

for i:=1 to m do 

  if a[i] mod 2=0 then write(a[i]:4);

readln;

end.

uses crt;
var a:array[1..1000000] of longint;
      n,i,d:longint;
begin
      clrscr;
      write('Nhap so luong phan tu: '); readln(n);
      for i:=1 to n do 
            begin
                  write('Nhap phan tu thu ',i,': '); readln(a[i]);
            end;
      write('Cac so chan: ');
      for i:=1 to n do if a[i] mod 2=0 then write(a[i],' ');
      readln;
end.

Câu 1: 

uses crt;

var n,i:integer;

s:real;

begin

clrscr;

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

s:=1;

for i:=1 to n do

s:=s*i;

writeln(s);

readln;

end.

Câu 2: 

uses crt;

var t,i,n:integer;

begin

clrscr;

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

t:=0;

for i:=1 to n do

t:=t+i;

writeln(t);

readln;

end.

Bài 2 dùng công thức n*(n+1)/2

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.