Zadanie 26

#include <iostream>
#include <math.h>
using namespace std;
int a,b;

int fibonacci(int n)
{
    int a=2;
    int c;
    if(n==0)
    {
       return 0;
    }
    if(n==1)
    {
        return 1;
    }
    int c1=0;
    int c2=1;
    while(a<=n)
    {
        c=c1+c2;
        c1=c2;
        c2=c;
        a++;
    }
    return c;
}

int main()
{
    cout << "Podaj liczbe"<<endl;
    cin >> a;
    cout << fibonacci(a)<<endl;
    cout << "Liczba 55"<<endl;
    cout << fibonacci(55)<<endl;
    cout << "Liczba 25"<<endl;
    cout << fibonacci(25)<<endl;
    return 0;
}