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- #include <iostream>
- using namespace std;
- int fattRecur(int n);
- int main()
- {
- int n;
- double sumOfFactorials = 2;
- cout << "Iserire il numero per il quale si vuole eseguire il calcolo: ";
- cin >> n;
- for (int i = 2; i != (n + 1); i++)
- {
- double thisFactorial = fattRecur(i);
- double thisReciproc = 1 / thisFactorial;
- sumOfFactorials += thisReciproc;
- }
- cout << "Il risultato e': " << sumOfFactorials;
- }
- int fattRecur(int n)
- {
- return n == 1 ? 1 : n * fattRecur(n - 1);
- }
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