diff --git "a/2101040022/chapter_5/\346\226\220\346\263\242\351\202\243\345\245\221\346\225\260.cpp" "b/2101040022/chapter_5/\346\226\220\346\263\242\351\202\243\345\245\221\346\225\260.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..b128c5efe33d6fa9ef218c872f366f821572b852
--- /dev/null
+++ "b/2101040022/chapter_5/\346\226\220\346\263\242\351\202\243\345\245\221\346\225\260.cpp"
@@ -0,0 +1,18 @@
+#include<stdio.h>
+int fib(int m)
+{
+	if(m>=3)
+	{
+		return fib(m-1)+fib(m-2);
+	}
+	else{
+		  return 1;
+		 } 
+}
+int main()
+{
+	int n;
+	scanf("%d",&n);
+	printf("%d",fib(n));
+	return 0;
+ } 
\ No newline at end of file