Задание 2.
#include <iostream>
using namespace std;
int main()
{
setlocale(LC_ALL, "rus");
int n;
cin >> n;
while(true)
{
cout << n << " ";
if (n == 1)
{
break;
}
else if (n % 2 == 0)
{
n /= 2;
}
else if (n % 2 == 1)
{
n *= 3;
n++;
}
}
cout << endl;
return 0;
}
Задание 3.
#include <iostream>
using namespace std;
int main()
{
setlocale(LC_ALL, "rus");
for (int i = 1; i < 100; i++)
{
cout << i << " ";
if (i % 20 == 19)
{
cout << endl;
}
}
return 0;
}
Задание 4.
#include <iostream>
#include <iomanip>
using namespace std;
int factorial(int n)
{
if (n == 1)
{
return 1;
}
return n * factorial(n - 1);
}
int main()
{
setlocale(LC_ALL, "rus");
int N;
cin >> N;
double sum = 0;
for (int i = 1; i <= N; i++)
{
sum += 1.0 / factorial(i);
}
cout << setprecision(10);
cout << sum << endl;
return 0;
}
Объяснение:
program chik;
const n=12;
var i,s:integer;
a:array[1..12]of integer;
begin
s:=0;
for i:=1 to n do
begin
read(a[i]);
if(i<7)then s:=s+a[i];
end;
writeln(s);
end.
2)
program chik;
const n=10;
var i,s:integer;
a:array[1..12]of integer;
begin
s:=0;
for i:=1 to n do
begin
read(a[i]);
if(a[i]=7)then s:=s+1;
end;
writeln(s);
end.