课后题sumArray与sumSlice

func sumArray(arrF [4]int) int {
    sum := 0
    for _, it := range arrF {
        sum += it
    }
    return sum
}

func sumSlice(arrF []int) int {
    sum := 0
    for _, it := range arrF {
        sum += it
    }
    return sum
}

func sum(arrF ...int) int {
    sum := 0
    for _, it := range arrF {
        sum += it
    }
    return sum
}

func minSlice(arrF []int) int {
    n := arrF[0]
    for _, it := range arrF {
        if n > it{
            n = it
        }
    }
    return n
}

func main() {
    fmt.Print(sumArray([4]int{1, 1, 1, 1}),"\n")
    // ERROR
    // cannot use [4]int{…} (value of type [4]int) 
    // as []int value in argument to sumSlice
    // fmt.Print(sumSlice([4]int{1, 1, 1, 1}),"\n")   
    fmt.Print(sumSlice([]int{1, 2, 3, 4, 5}),"\n")
    fmt.Print(sum(2, 2, 2, 2),"\n")   
    fmt.Print(minSlice([]int{1, 2, 3, 4, 5}),"\n")
}