diff --git a/selfMonitor.cpp b/selfMonitor.cpp
index 54f4e9a..4df37f2 100644
--- a/selfMonitor.cpp
+++ b/selfMonitor.cpp
@@ -16,9 +16,8 @@ void saveData(){
     FILE *fp = fopen("save.txt", "w");
     if(fp!=NULL){
         time_t timeNow = time(0);
-        tm *curTime;
-        if(curTime->tm_hour<4) curTime = localtime(&timeNow-86400); 
-        else curTime = localtime(&timeNow);
+        tm *curTime = localtime(&timeNow);
+        if(curTime->tm_hour<4) curTime = localtime(&timeNow-86400);
         fprintf(fp, "%d %d %d %d", blackListTimeCount,curTime->tm_year,curTime->tm_mon,curTime->tm_mday);
         fclose(fp);
     }
@@ -46,9 +45,8 @@ int main(){
         int curYear,curMonth,curDay;
         fscanf(fp, "%d%d%d%d", &blackListTimeCount,&curYear,&curMonth,&curDay);
         time_t timeNow = time(0);
-        tm *curTime;
-        if(curTime->tm_hour<4) curTime = localtime(&timeNow-86400); 
-        else curTime = localtime(&timeNow);
+        tm *curTime = localtime(&timeNow);
+        if(curTime->tm_hour<4) curTime = localtime(&timeNow-86400);
         if(curTime->tm_year!=curYear||curTime->tm_mon!=curMonth||curTime->tm_mday!=curDay){
             blackListTimeCount = 0;
         }