Fibonacci的算法

package com.yenange.test2;
import java.util.Scanner;
public class Fibonacci {
private static Scanner input = new Scanner(System.in);
public static void main(String[] args) {
System.out.println("-----------第1种算法------------");
int num1 = 1;
int num2 = 1;
int temp, count;
System.out.println("请输入要查询的是第几个数(>=2):");
count = input.nextInt();

System.out.println("第1个数是:1");
System.out.println("第2个数是:1");
for (int i = 3; i <= count; i++) {
temp = num2;
num2 += num1;
System.out.println("第" + i + "个数是:" + num2);
num1 = temp;
}

System.out.println("-----------第2种算法------------");
System.out.println("第" + count + "个数是:" + cal(count));

System.out.println("-----------第3种算法------------");
int[] arr = new int[count];
arr[0] = 1;
arr[1] = 1;
for (int i = 2; i < arr.length; i++) {
arr[i] = arr[i - 1] + arr[i - 2];
System.out.println("第" + (i + 1) + "个数是:" + arr[i]);
}
}

static int cal(int count) {
if (count <= 2) {
return 1;
}
return cal(count - 1) + cal(count - 2);
}
}