Answer to Question #300281 in C++ for Norri

Question

How to execute this using vector

#include <cmath>

#include <iomanip>

#include <iostream>

using namespace std;

int fibo(int n);

int main() {

string header = " Index Fibonacci number Fibonacci quotient Deviation";

double lim = (1.0 + sqrt(5.0)) / 2.0;

int fib_sequence[21];

for (short i = 0; i < 21; i++) {

fib_sequence[i] = fibo(i);

}

cout << header << endl;

for (short i = 0; i < 20; i++) {

double q = (double)fib_sequence[i + 1] / (double)fib_sequence[i];

cout << setw(5) << i << setw(15) << fib_sequence[i] << setw(20) << fixed

<< setprecision(10) << q << setw(20) << scientific << setprecision(3)

<< lim - q << endl;

}

return 0;

}

int fibo(int n) {

if (n <= 1)

return n;

return fibo(n - 1) + fibo(n - 2);

}

Answer 1

#include <cmath>
#include <iomanip>
#include <string>
#include <iostream>
#include <vector>

using namespace std;

int fibo(int n);

int main()
{
	string header = " Index Fibonacci number Fibonacci quotient Deviation";
	double lim = (1.0 + sqrt(5.0)) / 2.0;


	vector<int>fib_sequence;
	for (short i = 0; i < 21; i++)
	{
		fib_sequence.push_back(fibo(i));
	}
	cout << header << endl;
	for (short i = 0; i < 20; i++) 
	{
		double q = (double)fib_sequence[i + 1] / (double)fib_sequence[i];
		cout << setw(5) << i << setw(15) << fib_sequence[i] << setw(20) << fixed
		<< setprecision(10) << q << setw(20) << scientific << setprecision(3)
		<< lim - q << endl;
	}
	return 0;
}

int fibo(int n)
{
	if (n <= 1)
		return n;
	return fibo(n - 1) + fibo(n - 2);
}