后面老師說了?。。栴}作廢


//?double_average_test.go

package?algo

import?(
???"fmt"
???"testing"
)

func?TestDoubleAverage(t?*testing.T)?{
???sum?:=?int64(0)

???count,?amount?:=?int64(10),?int64(100*100)
???for?i?:=?int64(0);?i?<?count;?i++?{
??????x?:=?DoubleAverage(count?-?i,?amount)?//每次人減少
??????amount?-=?x????????????????????????//每次紅包減少

??????fmt.Println(x)
??????sum?+=?x
???}
???fmt.Println("--總計結束--")
???fmt.Println(sum)
}

代碼

//double_average.go

package?algo

import?(
???"math/rand"
???"time"
)

func?init()?{
???rand.Seed(time.Now().UnixNano())?//這里保證啟動的時候隨機
}

const?min?=?int64(1)

func?DoubleAverage(count,?amount?int64)?int64?{
???if?count?==?1?{
??????return?amount
???}

???//?計算出最大可用金額
???max?:=?amount?-?min*count
???//?計算最大可用的平均值
???avg?:=?max?/?count
???//?計算2倍均值
???avg2?:=?avg?*?2?+?min
???//?隨機紅包序列,?把二倍均值作為隨機數的最大數

???x?:=?rand.Int63n(avg2)?+?min
???return?x
}