算法4-1.1.19在计算机上运行以下程序

在计算机上运行以下程序:

public class Main{
    public static long F(int N){
        if (N == 0) return 0;
        if (N == 1) return 1;
        return F(N-1)+F(N-2);
    }
    public static void main(String[] args) {
        //裴波那切数列
        int[] f = new int[100];
        f[0]=0;f[1]=1;
        for (int N = 0; N < 100; N ++){
            System.out.println(N+","+F(N));
        }
    }
}

改进程序

public class Main{
    public static void main(String[] args) {
        //裴波那切数列,用数组保存已经计算过的值
        int[] f = new int[100];
        f[0]=0;f[1]=1;
        for (int N = 2; N < 100; N ++){
            f[N]+=f[N-1]+f[N-2];
            System.out.println(N+","+f[N]);
            //System.out.println(N+","+F(N));
        }
    }
}

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