go 生成随机小数 指定范围

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package main   import (     "crypto/hmac"     "crypto/sha1"     "encoding/base64"     "encoding/json"     "errors"     "fmt"     "net/http"     "net/url"     "strings"     "time"     "math/rand"     "strconv"       . "github.com/nntaoli-project/GoEx"     "github.com/sumorf/goalgo"     "github.com/sumorf/goalgo/log" )     func main(){<br>//必须是位数相同,前面的也要相同(反正就是不好用,但是我上网搜了也搜不到,只是符合我的需求而已) 　　RandFloat64(0.001234,0.009874) }     //随机整数 func RandInt64(min, max int64) int64 {     if min >= max || min == 0 || max == 0 {         return max     }     rand.Seed(time.Now().UnixNano())     return rand.Int63n(max-min) + min } //zll 生成指定范围的随机小数,注:很不智能,所以限制min和max前面的数字必须相同例如min:0.00123456 max:0.00222336这样 func RandFloat64(min,max float64) float64{     //转为字符串     my_min := strconv.FormatFloat(min,'f',-1,64)     my_max := strconv.FormatFloat(max,'f',-1,64)       if len(my_min)!=len(my_max){         return 0         //fmt.Println("错误")     }else{         qianzhui := ""         houzhui1 := ""         houzhui2 := ""         sw := 0         for i := 0;i<len(my_min);i++ {             str1 := string(my_min[i])             str2 := string(my_max[i])             if sw==0{                 if my_min[i]==my_max[i]{                     qianzhui = qianzhui + str1                 }else{                     sw = 1                     houzhui1 = houzhui1 + str1                     houzhui2 = houzhui2 + str2                 }             }else{                 houzhui1 = houzhui1 + str1                 houzhui2 = houzhui2 + str2             }         }         //return 0,qianzhui+"**"+houzhui1+"**"+houzhui2         //fmt.Println(qianzhui+"**"+houzhui1+"**"+houzhui2)         //前缀字符串转整数         qian1,_ := strconv.ParseInt(houzhui1,10,64)         qian2,_ := strconv.ParseInt(houzhui2,10,64)         //生成随机整数         jj := RandInt64(qian1,qian2)         //随机整数转字符串         jj_str := strconv.FormatInt(jj,10)         //前缀拼接随机字符串         all_str := qianzhui+jj_str         //全字符串转浮点数         jieguo,_ := strconv.ParseFloat(all_str,64)         return jieguo     }     return 0 }