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#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 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 a[1000],i,n,t;
int main()
{
cin>>n;
for (i=1; i<=n; i++) cin>>a[i];
for (i=1; i<=n; i++) cout<<a[i]<<" ";
cout<<endl;
t=0;
for (i=1; i<=n; i++) t+=a[i];
cout<<t;
return 0;
}
Var a:array[1..15] of integer;
i,s:integer;
Begin
I:=1;
While i<=15 do
Begin
Write('Nhap phan tu thu ',i,' = ');readln(a[i]);
s:=s+a[i];
i:=i+1;
End;
Write('Tong la ',s);
Readln;
End.
Caua1:
program caumot;
begin
writeln('lop 8A chao ban!');
end.
Câu 2:
program cauhai;
int a,b,c :real;
begin
write('a='); readln(a);
write('b='); readln(b);
c= a+b;
write('Tong hai so a b la:',c);
end.
#include <bits/stdc++.h>
using namespace std;
long long s,i,n;
int main()
{
cin>>n;
s=0;
for (i=1; i<=n; i++)
if (i%2==1) s=s+i*i;
cout<<s;
return 0;
}
program bai1;
uses crt;
var a,b,c,s: real;
begin
clrscr;
write('nhap so thu nhat ='); readln(a);
write('nhap so thu hai ='); readln(b);
write('nhap so thu ba ='); readln(c);
s:=a+b+c;
writeln('tong ba so a,b,c =',s:4:2);
readln;
end.
program bai1;
uses crt;
var n: integer;
begin
clrscr;
write('nhap so n ='); readln(n);
if n mod 2 = 0 then
writeln('la so chan ') else
writeln('la so le ');
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.
Câu 1:
#include <bits/stdc++.h>
using namespace std;
double a,b,c;
int main()
{
cin>>a>>b>>c;
cout<<fixed<<setprecision(2)<<(a+b+c)/3;
return 0;
}
program BaiTap;
var
A: array[1..150] of integer;
N, i, sum: integer;
begin
write('Nhap so phan tu cua day A (N <= 150): ');
readln(N);
for i := 1 to N do
begin
write('Nhap phan tu thu ', i, ': ');
readln(A[i]);
end;
writeln('Day so vua nhap la:');
for i := 1 to N do
write(A[i], ' ');
writeln;
sum := 0;
for i := 1 to N do
if A[i] mod 2 = 0 then
sum := sum + A[i];
writeln('Tong cac phan tu chan trong day la: ', sum);
readln;
end.
uses crt;
var i,n,s:integer;
begin
clrscr;
write('n='); readln(n);
s:=0;
for i:=1 to n do
if i mod 2=1 then s:=s+i;
writeln('Tong cac so le trong khoang tu 1 toi ',n,' la: ',s);
readln;
end.