编辑代码

class Main {
        public static void main(String[] args) {
        int n = 4;
        int result = fibonacci(n);
        System.out.println(result);
    }
    public static int fibonacci(int n) {
        if (n <= 0) {
            return 0;
        } else if (n == 1) {
            return 1;
        } else {
            return fibonacci(n - 1) + fibonacci(n - 2);
        }
    }
}