实现 Fibonacci 数列

1, 1, 2, 3, 5, 8, 13, ...

示例:

package fib

import (
 "fmt"
 "testing"
)

func TestFirstTest(t *testing.T) {
 var a int = 1
 var b int = 2
 t.Log(a)
 for i := 0; i < 5; i++ {
  t.Log(" ", b)
  tmp := a
  a = b
  b = tmp + a
 }
 t.Log()
}