From c02fce39fbcf5111aec08cd0fa5b6137e8c22873 Mon Sep 17 00:00:00 2001
From: listen <494177603@qq.com>
Date: Tue, 16 Nov 2021 13:42:16 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8A=A0=E5=85=A5=E5=8C=BA=E9=97=B4=E9=9A=8F?=
 =?UTF-8?q?=E6=9C=BA=E6=95=B0?=
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---
 rand.go | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 rand.go

diff --git a/rand.go b/rand.go
new file mode 100644
index 0000000..6ed2f12
--- /dev/null
+++ b/rand.go
@@ -0,0 +1,44 @@
+package helper
+
+import (
+	"crypto/rand"
+	"math/big"
+)
+
+/**
+ * 获取int类型的区间随机数
+ */
+func GetRandInt(min, max int) (r int, err error) {
+	_r, err := GetRandInt64(int64(min), int64(max))
+	if err != nil {
+		return
+	}
+	r = int(_r)
+	return
+}
+
+
+/**
+ * 获取int64类型的区间随机数
+ */
+func GetRandInt64(min, max int64) (r int64, err error) {
+	if min == max {
+		r = min
+		return
+	}
+	if min > max {
+		max, min = min, max
+	}
+	result, err := rand.Int(rand.Reader, big.NewInt(max-min))
+	if err != nil {
+		return
+	}
+	r = result.Int64() + min
+
+	b, err := rand.Int(rand.Reader, big.NewInt(2))
+	if err == nil && b.Int64() == 1 {
+		r += 1
+	}
+
+	return
+}