diff --git a/old_homework/11.9_1.cpp b/old_homework/11.9_1.cpp
index 5849666..0b628ed 100644
--- a/old_homework/11.9_1.cpp
+++ b/old_homework/11.9_1.cpp
@@ -1,3 +1,5 @@
+//登录系统(普通)
+
 #include<iostream>
 #include<string>
 #include<windows.h>
diff --git a/old_homework/11.9_2.cpp b/old_homework/11.9_2.cpp
index 80c7c3a..e6c44d9 100644
--- a/old_homework/11.9_2.cpp
+++ b/old_homework/11.9_2.cpp
@@ -1,3 +1,5 @@
+//登录系统(升级版)
+
 #include<iostream>
 #include<string>
 #include<windows.h>
diff --git a/homework_2.cpp b/old_homework/12.6_1.cpp
similarity index 65%
rename from homework_2.cpp
rename to old_homework/12.6_1.cpp
index 6f44540..7814187 100644
--- a/homework_2.cpp
+++ b/old_homework/12.6_1.cpp
@@ -1,6 +1,9 @@
+//猴子吃桃
+
 #include <iostream>
 using namespace std;
 
+/*
 int main() {
     int peaches = 1;  // 第10天剩下的桃子数
     // 逆推从第10天到第1天
@@ -10,3 +13,15 @@ int main() {
     cout << "第1天摘的桃子数量是: " << peaches << endl;
     return 0;
 }
+*/
+
+int main(){
+    int x = 1,day = 9;
+    while (day > 0)
+    {
+        x = (x+1) * 2;
+        day--;
+    }
+    cout <<"共摘了"<<x<<"个桃子"<<endl;
+    return 0;
+} 
\ No newline at end of file
diff --git a/homework_1.cpp b/old_homework/12.7_2.cpp
similarity index 62%
rename from homework_1.cpp
rename to old_homework/12.7_2.cpp
index 3c36d53..f0273af 100644
--- a/homework_1.cpp
+++ b/old_homework/12.7_2.cpp
@@ -1,6 +1,8 @@
+//计算阶乘
 #include <iostream>
 using namespace std;
 
+/*
 int main() {
     int n;
     cin >> n;  // 输入一个正整数n
@@ -14,3 +16,18 @@ int main() {
     cout << result << endl;  // 输出阶乘的结果
     return 0;
 }
+*/
+
+int main(){
+    long long sum = 1;
+    int n;
+    cin >>n;
+    int i = 1;
+    while (i <= n)
+    {
+        sum *= i;
+        i++;
+    }
+    cout <<sum<<endl;
+    return 0;    
+}
\ No newline at end of file