diff --git a/MainTest.go b/MainTest.go
index 5854da9..e05dbfa 100644
--- a/MainTest.go
+++ b/MainTest.go
@@ -7,13 +7,24 @@
 package main
 
 import (
+	"Go-Tool/util"
 	"Go-Tool/util/reflectM"
 	"fmt"
 	"reflect"
 )
 
 func main() {
-	testReflect()
+	fmt.Println(util.Crc32Mode("ewqeqweqw", 4))
+	fmt.Println(util.Crc32Mode("sdasdsa", 4))
+	fmt.Println(util.Crc32Mode("dasdsadasdas", 4))
+	fmt.Println(util.Crc32Mode("321321312", 4))
+	fmt.Println(util.Crc32Mode("dsadas", 4))
+	fmt.Println(util.Crc32Mode("dasd23132131", 4))
+	fmt.Println(util.Crc32Mode("eqwewqewqd4312312", 4))
+	fmt.Println(util.Crc32Mode("3123213dasdasdas", 4))
+	fmt.Println(util.Crc32Mode("312321dfdsfsdg", 4))
+	fmt.Println(util.Crc32Mode("ewqrewrqwe", 4))
+	//testReflect()
 }
 
 func testReflect() {
diff --git a/util/HashModUtil.go b/util/HashModUtil.go
index 8f77146..fbb467e 100644
--- a/util/HashModUtil.go
+++ b/util/HashModUtil.go
@@ -40,6 +40,7 @@ func crc32Change(s string) uint32 {
 	return crc32.ChecksumIEEE([]byte(s))
 }
 
+//这边模的结果是从0开始到mod-1：即范围为 [0,mod)。可以做相应改进
 func Crc32Mode(s string, mod int) int {
 	u := crc32Change(s)
 	return int(u) % mod