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uses crt;
var n,i:integer;
s:real;
//chuongtrinhcon
function gthua(n:integer):real;
var gt:real;
i:integer;
begin
gt:=1;
for i:=1 to n do
gt:=gt*i;
gthua:=gt;
end;
//chuongtrinhcon
function lthua(n,x:integer):real;
var lt:real;
i:integer;
begin
lt:=1;
for i:=1 to x do lt:=lt*x;
lthua:=lt;
end;
//chuongtrinhchinh
begin
clrscr;
readln(n);
s:=0;
for i:=1 to n do
s:=s+(lthua(i,i)/gthua(i));
writeln(s:4:2);
readln;
end.
uses crt;
var i,n:integer;
s:real;
begin
clrscr;
n:=1;
s:=0;
while (n<=10000) do
begin
n:=n+2;
s:=s+1/n;
end;
writeln(s:4:2);
readln;
end.
2:
#include <bits/stdc++.h>
using namespace std;
double s;
int n,i;
int main()
{
cin>>n;
s=0;
for (i=1; i<=n; i++)
s=s+(i*1.0)/((i+1)*1.0);
cout<<fixed<<setprecision(2)<<s;
return 0;
}
Bài 1:
function canbac2(x:longint):real;
begin
canbac2:=sqrt(x);
end;
Bài 2:
function tong(n:longint):longint;
var s,i:longint;
begin
s:=0;
for i:=1 to n do
s:=s+i;
tong:=s;
end;
Bài 2:
uses crt;
var x,i,n,dem:integer;
begin
clrscr;
readln(n);
dem:=0;
for i:=1 to n do
begin
readln(x);
if x mod 2=0 then inc(dem);
end;
writeln(dem);
readln;
end.
var A:
array[1..n] of integer;
i, j, n: integer;
begin
write('Nhap so phan tu cua mang: ');
readln(n);
for i := 1 to n do
begin
write('Nhap phan tu thu ', i, ': ');
readln(A[i]);
end;
for i := 1 to n - 1 do
for j := i+1 to n do
if (A[i] mod 2 = 0) and (A[j] mod 2 = 0) and (A[i] < A[j]) or (A[i] mod 2 = 1) and (A[j] mod 2 = 1) and (A[i] > A[j]) then
begin
swap(A[i], A[j]);
end;
writeln('Mang da sap xep la: ');
for i := 1 to n do
writeln(A[i]);
end.
Program viet_chuong_trinh;
uses crt;
var
i,n,k: integer;
S:real;
begin
clrscr;
writeln('Moi nhap n = '); readln(n);
S:=0;
k:=0;
for i:=1 to n do
begin
k:=k+i;
S:=S + (1/k);
end;
write(S); readln;
end.