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Bài 1:
uses crt;
var n,i:integer;
s:real;
begin
clrscr;
write('Nhap n='); readln(n);
s:=0;
for i:=1 to n do
s:=s+1/(2*i+1);
writeln(s:4:2);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
long long i,n;
double s;
int main()
{
cin>>n;
s=0;
for (i=1; i<=n; i++)
s=s+((1*1.0)/(2*(i*1.0+1*1.0)));
cout<<fixed<<setprecision(2)<<s;
return 0;
}
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;
}
Var i,S,n: longint;
Begin
Readln(n);
For i:=1 to n do S:=S+i
Write(S);
Readln
End.
program TimMinMaxTrungBinh;
var
N, i, max, min, sum: integer;
a: array[1..50] of integer;
TB, minTB, maxTB: real;
begin
writeln('Nhap so nguyen duong N:');
readln(N);
sum := 0;
for i := 1 to N do
begin
write('Nhap so thu ', i, ': ');
readln(a[i]);
sum := sum + a[i];
end;
max := a[1];
min := a[1];
for i := 2 to N do
begin
if a[i] > max then
max := a[i];
if a[i] < min then
min := a[i];
end;
TB := sum / N;
minTB := TB;
maxTB := TB;
for i := 1 to N do
begin
if (a[i] < TB) and (a[i] < minTB) then
minTB := a[i];
if (a[i] > TB) and (a[i] > maxTB) then
maxTB := a[i];
end;
writeln('Gia tri lon nhat la: ', max);
writeln('Gia tri nho nhat la: ', min);
writeln('Gia tri trung binh la: ', TB:2:2);
if minTB = TB then
writeln('Khong co gia tri nao nho hon TB')
else
writeln('Gia tri nho nhat < TB la: ', minTB);
if maxTB = TB then
writeln('Khong co gia tri nao lon hon TB')
else
writeln('Gia tri lon nhat > TB la: ', maxTB);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
long long x,n,i,ln,t;
int main()
{
cin>>n;
ln=LLONG_MIN;
t=0;
for (i=1; i<=n; i++)
{
cin>>x;
ln=max(ln,x);
t+=x;
}
cout<<"So lon nhat la: "<<ln<<endl;
cout<<"Tong la: "<<t;
return 0;
}
Program HOC24;
var a: array[1..32000] of integer;
i,max,,n: integer;
begin
write('Nhap so phan tu 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 a[i]<max then max:=a[i];
write('So lon nhat la: ',max);
readln
end.
uses crt;
var a:array[1..1000000] of longint;
n,i,max:longint;
begin
clrscr;
write('Nhap so luong phan tu: '); readln(n);
max:=a[1];
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,': '); readln(a[i]);
if a[i]>max then max:=a[i];
end;
writeln('GTLN: ',max);
readln;
end.
uses crt;
var n,max,i:integer;
a:array[1..100]of integer;
begin
clrscr;
write('Nhap 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 bai1;
uses crt;
var n,i: integer;
s:real;
begin
clrscr;
s:=0;
write('nhap n ='); readln(n);
for i:= 1 to n do
s:=s+(2*i-1)/(2*i);
writeln('S = ' ,s :4:2);
readln;
end.
var n,i:integer;
s:real;
begin
write('n=');readln(n);
s:=0;
for i:=1 to n do s:=s+(2*i-i)/(2*i);
writeln(' tong la : 's)
readln;
end.