diff --git a/homework_laster.cpp b/homework_laster.cpp
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--- /dev/null
+++ b/homework_laster.cpp
@@ -0,0 +1,42 @@
+/*某邮局对邮寄包裹有如下规定:若包裹的重量超过30千克，则不予邮寄，对可以邮寄的包裹每件收取手续费0.2元，再加上根据以下收费标准计算的结果。收费标准(元/千克)
+重量(千克)
+重量<=100.8010<重量<=200.750.7
+20<重量<=30
+请编写一个程序，输入包裹重量，输出所需费用或“Fail”表示无法邮寄*/
+#include<iostream>
+#include<windows.h>
+#include<iomanip>
+
+using namespace std;
+
+int main(){
+    float CIN,money;
+
+    cin >>CIN;
+    
+    if (CIN <= 10)
+    {
+        money = CIN * 0.80 + 0.20;
+        cout <<fixed<<setprecision(2)<<money;
+        Sleep(2000);
+        return 0;
+    }else if (CIN > 10 and CIN <= 20)
+    {
+        money = CIN * 0.75 + 0.20;
+        cout <<fixed<<setprecision(2)<<money;
+        Sleep(2000);
+        return 0;
+    }else if (CIN > 20 and CIN <=30)
+    {
+        money = CIN * 0.7 + 0.20;
+        cout <<fixed<<setprecision(2)<<money;
+        Sleep(2000);
+        return 0;
+    }else
+    {
+        cout <<"Fail!";
+        Sleep(2000);
+        return 1;
+    }
+    return 0;
+}
\ No newline at end of file
diff --git a/homework_laster.exe b/homework_laster.exe
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index 0000000..012697d
Binary files /dev/null and b/homework_laster.exe differ
diff --git a/homework_new.cpp b/old_homework/11.9_1.cpp
similarity index 100%
rename from homework_new.cpp
rename to old_homework/11.9_1.cpp
diff --git a/homework_newplus.cpp b/old_homework/11.9_2.cpp
similarity index 100%
rename from homework_newplus.cpp
rename to old_homework/11.9_2.cpp