嗨，我是Go編程語言的新手。我正在從http://www.golang-book.com/學習在第4章的練習中，有一個關于從華氏溫度轉換為攝氏度的問題。我將答案編碼如下    package mainimport "fmt"func main(){    fmt.Println("Enter temperature in Farentheit ");    var input float64    fmt.Scanf("%f",&input)    var outpu1 float64 = ( ( (input-32)* (5) ) /9)    var outpu2 float64=  (input-32) * (5/9)    var outpu3 float64= (input -32) * 5/9    var outpu4 float64=  ( (input-32) * (5/9) )     fmt.Println("the temperature in Centigrade is ",outpu1)    fmt.Println("the temperature in Centigrade is ",outpu2)    fmt.Println("the temperature in Centigrade is ",outpu3)    fmt.Println("the temperature in Centigrade is ",outpu4) }輸出如下sreeprasad:projectsInGo sreeprasad$ go run convertFarentheitToCentigrade.go Enter temperature in Farentheit 12.234234the temperature in Centigrade is  -10.980981111111111the temperature in Centigrade is  -0the temperature in Centigrade is  -10.980981111111111the temperature in Centigrade is  -0我的問題是關于outpu2和outpu4。括號是正確的，但是它如何或為什么顯示-0。誰能解釋一下