zadacha

#include <iostream>

using namespace std;

int main()

{

setlocale(LC_ALL, "Russian");

int N;

cout << "Введите число N: ";

cin >> N;

// for

double dobutok = 1;

double a = 4;

dobutok *= a;

for (int i = 2; i <= N; i++)

{

a = 1 / (2 + a);

dobutok *= a;

}

cout << "Добуток через 'for': " << dobutok << endl;

cout << "---------------------------------" << endl;

// while

dobutok = 1;

a = 4;

dobutok *= a;

int i = 2;

while (i <= N)

{

a = 1 / (2 + a);

dobutok *= a;

i++;

}

cout << "Добуток через 'while': " << dobutok << endl;

cout << "---------------------------------" << endl;

}