linux/windows/Mac平台生成随机数的不同方法

linux平台，使用rand.Seed()

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//rand_linux.go package main   import (     "math/rand"     "time" )   //get the random number in [min, max] func RandInt64(min, max int64) int64 {     if min >= max || max == 0 {         return max     }     rand.Seed(time.Now().UnixNano())     //fmt.Println(r.Int63n(max-min) + min)     x := rand.Int63n(max-min) + min     //fmt.Println(x)     return x }   //get the random numer in [min, max] func RandInt(min, max int) int {     if min >= max || max == 0 {         return max     }     rand.Seed(time.Now().UnixNano())           //x := r.Intn(max-min) + min     x := rand.Intn(max - min) + min           //fmt.Println("RandInt: = ",x)     return x }

　　windows平台，直接使用 rand.Int63n() 或者 rand.Intn()

   

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//rand_windows.go package main   import (     "math/rand" )   //get the random number in [min, max] func RandInt64(min, max int64) int64 {     if min >= max || max == 0 {         return max     }     x := rand.Int63n(max-min) + min     //fmt.Println(x)     return x }   //get the random numer in [min, max] func RandInt(min, max int) int {     if min >= max || max == 0 {         return max     }           x := rand.Intn(max - min) + min           //fmt.Println("RandInt: = ",x)     return x }

　　Mac平台

//rand_darwin.go

package main

import (
    "math/rand"
    "time"
)

//RandInt64 get the random number in [min, max]
func RandInt64(min, max int64) int64 {
    if min >= max || max == 0 {
        return max
    }
    rand.Seed(time.Now().UnixNano())
    //fmt.Println(r.Int63n(max-min) + min)
    x := rand.Int63n(max-min) + min
    //fmt.Println(x)
    return x
}

//RandInt get the random numer in [min, max]
func RandInt(min, max int) int {
    if min >= max || max == 0 {
        return max
    }
    rand.Seed(time.Now().UnixNano())

    //x := r.Intn(max-min) + min
    x := rand.Intn(max-min) + min

    //fmt.Println("RandInt: = ",x)
    return x
}