diff --git a/Recursion/P27_All_Sorted.cpp b/Recursion/P27_All_Sorted.cpp
new file mode 100644
index 0000000..804415f
--- /dev/null
+++ b/Recursion/P27_All_Sorted.cpp
@@ -0,0 +1,9 @@
+//For a,b,c we have sort abc acb bac bca cab cba(6 kinds) This Program is to sort all of the kinds
+#include <iostream>
+
+using namespace std;
+
+int main() {
+
+	return 0;
+}
\ No newline at end of file
diff --git a/Recursion/P28_19_n!.cpp b/Recursion/P28_19_n!.cpp
new file mode 100644
index 0000000..8096865
--- /dev/null
+++ b/Recursion/P28_19_n!.cpp
@@ -0,0 +1,12 @@
+#include <iostream>
+using namespace std;
+int jc(int n){
+    if(n > 0)
+        return jc(n - 1)*n;
+    return 1;
+}
+
+int main(){
+    cout << jc(10) << endl;
+    return 0;
+}
diff --git a/Recursion/P28_19_n!.exe b/Recursion/P28_19_n!.exe
new file mode 100644
index 0000000..e6d5ae3
Binary files /dev/null and b/Recursion/P28_19_n!.exe differ
diff --git a/Recursion/P28_20_Feb.cpp b/Recursion/P28_20_Feb.cpp
new file mode 100644
index 0000000..61efc33
--- /dev/null
+++ b/Recursion/P28_20_Feb.cpp
@@ -0,0 +1,15 @@
+#include <iostream>
+using namespace std;
+
+int feb(int n){
+	if(n > 1)
+		return feb(n - 1) + feb(n - 2);
+	return 1;
+}
+
+int main(){
+	for(int i = 1;i < 10; i++){
+		cout << feb(i) << endl;
+	}
+	return 0;
+} 
diff --git a/Recursion/P28_20_Feb.exe b/Recursion/P28_20_Feb.exe
new file mode 100644
index 0000000..b766ac9
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diff --git a/Recursion/P29_21_ComplexFunc.cpp b/Recursion/P29_21_ComplexFunc.cpp
new file mode 100644
index 0000000..d405aa7
--- /dev/null
+++ b/Recursion/P29_21_ComplexFunc.cpp
@@ -0,0 +1,14 @@
+#include <iostream>
+using namespace std;
+
+int cf(int n){
+	if(n%2 == 1)
+		return cf(3*n + 1);
+	if(n%2 == 0)
+		return n / 2;
+}
+
+int main(){
+	cout << cf(5) << " "<< cf(6) << " " << cf(7) << endl;
+	return 0;
+}
diff --git a/Recursion/P29_21_ComplexFunc.exe b/Recursion/P29_21_ComplexFunc.exe
new file mode 100644
index 0000000..431a577
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diff --git a/Recursion/P29_22_Ackermann.cpp b/Recursion/P29_22_Ackermann.cpp
new file mode 100644
index 0000000..8431d9c
--- /dev/null
+++ b/Recursion/P29_22_Ackermann.cpp
@@ -0,0 +1,6 @@
+#include <iostream>
+using namespace std;
+int main(){
+	
+	return 0;
+}
diff --git a/Recursion/Resursion 递归 b/Recursion/Resursion 递归
new file mode 100644
index 0000000..e69de29
diff --git a/Recursion/新建 文本文档.txt b/Recursion/新建 文本文档.txt
new file mode 100644
index 0000000..e69de29