题解 | #记负均正II#

package main

import (
    "fmt"
)

func calculate(nums []int) {
    var negCnt int
    var noNegCnt int
    var noNegSum int

    for _, num := range nums {
        if num < 0 {
            negCnt++
        } else {
            noNegCnt++
            noNegSum += num
        }
    }

    var avg float64
    if noNegCnt == 0 {
        avg = 0.0
    } else {
        avg = float64(noNegSum) / float64(noNegCnt)
    }

    fmt.Println(negCnt)
    fmt.Printf("%.1f\n", avg)
}

func main() {
    var nums []int
    for {
        var num int
        n, _ := fmt.Scan(&num)
        if n == 0 {
            break
        }

        nums = append(nums, num)
    }

    calculate(nums)
}

// 本题输入为一行整数，所以采用：fmt.Scan(&num)