Question

Write a c++ program that evaluates the first 50 numbers of the Fibonacci sequence and store the numbers in an array.

The c++ program asks the user for an input to enter a positive integer 'n' and display the nth fibonacci number "FibN" that is stored inside of the array

Answer 1

#include <iostream>

using namespace std;

int main() {
    unsigned long long int FibN[50];
    FibN[0] = 0;
    FibN[1] = 1;
    for (int i = 2; i < 50; ++i) {
        FibN[i] = FibN[i-1] + FibN[i-2];
    }
    cout << "First 50 fibonacci numbers are" << endl;
    for (int i = 0; i < 50; ++i) {
        cout << FibN[i] << endl;
    }

    cout << "Enter a positive integer: ";
    int n;
    cin >> n;
    cout << "Fibonacci of " << n << " is " << FibN[n-1] << endl;
    return 0;
}