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2021-06-03 10:52:41 +08:00
parent c5f18c6051
commit 907511778b
54 changed files with 3540 additions and 50 deletions
--- a/teaching/wanzhaoyi/js/digui.html
+++ b/teaching/wanzhaoyi/js/digui.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+    <script>
+        // 递归 就是在函数内 调用自身
+        // 阶乘的函数    
+        // 5的阶乘  =   5*4*3*2*1  
+        // n的阶乘  =   n*（n-1）*(n-2)*(n-3)...*1
+        //             n*(n-1)*(n-1-1)*(n-1-1-1)*(n-1-1-1-1)....*1
+        function jc(n){
+            if(n==1){
+                return 1;
+            }else{
+                return n*jc(n-1)
+            }
+        }
+
+        // 4
+        // 4*jc(4-1)   4*jc(3)
+        // 4*jc(3) 4*3*jc(3-1)
+        // 4*3*jc(2)
+        // 4*3*2*jc(2-1)
+        // 4*3*2*jc(1)
+        // 4*3*2*1
+
+        var jiecheng=jc
+        jc=null
+        var res=jiecheng(5)
+        console.log(res)
+    </script>
+</head>
+<body>
+    
+</body>
+</html>