commit e35f7f1c6002119806962a2ffe4026adc6e2945c
Author: unknown <shihan1@staff.sina.com.cn>
Date:   Wed Apr 15 14:15:21 2020 +0800

    项目结构

diff --git a/imaptool.go b/imaptool.go
new file mode 100644
index 0000000..2d231a7
--- /dev/null
+++ b/imaptool.go
@@ -0,0 +1,11 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/taoshihan1991/imaptool/tools"
+)
+
+func main() {
+	fmt.Printf(tools.Reverse("!taoshihan ,olleH"))
+}
diff --git a/tools/stringutil.go b/tools/stringutil.go
new file mode 100644
index 0000000..2ffd204
--- /dev/null
+++ b/tools/stringutil.go
@@ -0,0 +1,11 @@
+// stringutil 包含有用于处理字符串的工具函数。
+package tools
+
+// Reverse 将其实参字符串以符文为单位左右反转。
+func Reverse(s string) string {
+	r := []rune(s)
+	for i, j := 0, len(r)-1; i < len(r)/2; i, j = i+1, j-1 {
+		r[i], r[j] = r[j], r[i]
+	}
+	return string(r)
+}