View Code of Problem 23

#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;
int main( )
{
    int n;
    double a[90];

    a[0]=1;
    a[1]=1;

    for(int i=2; i<90; i++)
    {
        a[i]=a[i-1]+a[i-2];
    }

    while(cin >> n)
    {
        if(n==0)
            break;
        cout << a[n] <<endl;
    }

    return 0;
}

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