diff --git a/practical_exercises/10_day_practice/day9/异常例子/3.cpp b/practical_exercises/10_day_practice/day9/异常例子/3.cpp
index bad186e..3783762 100644
--- a/practical_exercises/10_day_practice/day9/异常例子/3.cpp
+++ b/practical_exercises/10_day_practice/day9/异常例子/3.cpp
@@ -3,11 +3,11 @@ using namespace std;
 void temperature(int t)
 {
     try{
-        if(t==100) throw "�е㣡";
-        else if(t==0) throw "���㣡";
+        if(t==100) throw "It's at the boiling point.";
+        else if(t==0) throw "It reached the freezing point";
         else cout<<"the temperature is OK..."<<endl;
     }
-    catch(int x){cout<<"temperatore="<<x<<endl;}
+    catch(int x){cout<<"temperature="<<x<<endl;}
     catch(char const*s){cout<<s<<endl;}
 }
 int main(){
diff --git a/practical_exercises/10_day_practice/day9/异常例子/9.cpp b/practical_exercises/10_day_practice/day9/异常例子/9.cpp
index 05abf22..09b0e2a 100644
--- a/practical_exercises/10_day_practice/day9/异常例子/9.cpp
+++ b/practical_exercises/10_day_practice/day9/异常例子/9.cpp
@@ -17,9 +17,9 @@ class DiskNotFound:public FileSysException{
     public:
         char *Where(){return "DiskNotFound...";}
 };
-void main(){
+int main(){
     try{
-         .....  //�������
+//         .....  //�������
          throw FileSysException();
     }
     catch(DiskNotFound p){cout<<p.Where()<<endl;}
@@ -27,7 +27,7 @@ void main(){
     catch(FileSysException p){cout<<p.Where()<<endl;}
     catch(BasicException p){cout<<p.Where()<<endl;}
     try{
-        .....  //�������
+//        .....  //�������
          throw DiskNotFound();
     }
     catch(BasicException p){cout<<p.Where()<<endl;}