相关疑难解决方法(0)

有人能告诉我为什么这样有效:

s := time.Hour/73.0
fmt.Println("sleeping: ", s)
time.Sleep(s)

但这失败了:

d := 73.0
s := time.Hour/d
fmt.Println("sleeping: ", s)
time.Sleep(s)

这是错误:

invalid operation: time.Hour / d (mismatched types time.Duration and float64)