diff --git a/practical_exercises/10_day_practice/day4/时钟练习题/重载++的时钟.cpp b/practical_exercises/10_day_practice/day4/时钟练习题/重载++的时钟.cpp
index e85fd20..aa62d65 100644
--- a/practical_exercises/10_day_practice/day4/时钟练习题/重载++的时钟.cpp
+++ b/practical_exercises/10_day_practice/day4/时钟练习题/重载++的时钟.cpp
@@ -1,5 +1,5 @@
 /*
-���һ��ʱ���࣬�ܹ���¼ʱ���֡��룬��������++�������ÿִ��һ��++���㣬��ʱ1�룬��Ҫʹ��ʱ�����ܹ��Զ���λ��
+设计一个时钟类，能够记录时、分、秒，重载它的++运算符，每执行一次++运算，加时1秒，但要使计时过程能够自动进位。
 */
 #include<iostream>
 using namespace std;
@@ -12,7 +12,7 @@ class Time{
         }
         void operator++();
         void showTime(){
-            cout<<"��ǰʱ��Ϊ��"<<hour<<":"<<minute<<":"<<second<<endl;
+            cout<<"当前时间为："<<hour<<":"<<minute<<":"<<second<<endl;
         }
 
     private:
@@ -22,7 +22,7 @@ class Time{
 
 void Time::operator++(){
     ++second;
-    if(second=60){
+    if(second==60){
         second=0;
         ++minute;
         if(minute==60){