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fengchuanyu 9 months ago
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6 changed files with 172 additions and 0 deletions
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  1. BIN
      .DS_Store
  2. 18 0
      3_js基础/12_日期内置函数.html
  3. 30 0
      3_js基础/综合练习3编程题6.html
  4. 55 0
      3_js基础/综合练习3编程题7.html
  5. 24 0
      3_js基础/综合练习3编程题8.html
  6. 45 0
      3_js基础/综合练习3编程题9.html

BIN
.DS_Store
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+ 18 - 0
3_js基础/12_日期内置函数.html
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+<!DOCTYPE html>
 
+<html lang="en">
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+<body>
 
+    <script>
 
+        var todyObj = new Date();
 
+        console.log(todyObj);
 
+        console.log(todyObj.getFullYear());
 
+        console.log(todyObj.getMonth()+1);
 
+        console.log(todyObj.getDate());
 
+        console.log(todyObj.getHours());
 
+    </script>
 
+</body>
 
+</html>

+ 30 - 0
3_js基础/综合练习3编程题6.html
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+<!DOCTYPE html>
 
+<html lang="en">
 
+
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+
 
+<body>
 
+    <script>
 
+        function foo(n) {
 
+            for (var i = 0; i < n; i++) {
 
+                for (var k = 0; k < n - i; k++) {
 
+                    document.write("&nbsp;");
 
+                }
 
+                for (var j = 0; j < i + 1; j++) {
 
+                    document.write("*");
 
+                    document.write("&nbsp;")
 
+                }
 
+                document.write("<br>")
 
+            }
 
+        }
 
+        var num = window.prompt("请输入行数");
 
+        foo(num);
 
+
 
+    </script>
 
+</body>
 
+
 
+</html>

+ 55 - 0
3_js基础/综合练习3编程题7.html
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+<!DOCTYPE html>
 
+<html lang="en">
 
+
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+
 
+<body>
 
+    <script>
 
+        //斐波纳契 1 1 2 3 5 8 ....
 
+
 
+        // 非递归实现斐波纳契数列
 
+        // function fibonacci(n){
 
+        //     if(n<3){
 
+        //         return 1;
 
+        //     }else{
 
+        //         var a = 1;//前两项
 
+        //         var b = 1;//前一项
 
+        //         for(var i=0;i<n-3;i++){
 
+        //             b = a+b;
 
+        //             a = b-a;
 
+        //         }
 
+        //         return a+b
 
+        //     }
 
+        // }
 
+        // console.log(fibonacci(5))
 
+
 
+        // 非递归实现斐波纳契数列 方法二
 
+        // function fibonacci(n){
 
+        //     var arr = [1,1];
 
+        //     if(n>=3){
 
+        //         for(var i = 2;i<n;i++){
 
+        //             arr.push(arr[i-1]+arr[i-2]);
 
+        //         }
 
+        //     }
 
+        //     return arr[n-1];
 
+        // }
 
+        // console.log(fibonacci(5))
 
+
 
+
 
+        function fibonacci(n){
 
+            if(n<3){
 
+                return 1;
 
+            }else{
 
+                return fibonacci(n-1) + fibonacci(n-2)
 
+            }
 
+        }
 
+
 
+        console.log(fibonacci(6))
 
+    </script>
 
+</body>
 
+
 
+</html>

+ 24 - 0
3_js基础/综合练习3编程题8.html
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+<!DOCTYPE html>
 
+<html lang="en">
 
+
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+
 
+<body>
 
+    <script>
 
+        function piNum(n){
 
+            var sumNum = 0;
 
+            for(var i=1;i<=n;i++){
 
+               sumNum +=  Math.pow(-1,i-1)*(1/(2*i-1));
 
+            }
 
+            return sumNum * 4;
 
+        }
 
+
 
+        console.log(piNum(100));
 
+    </script>
 
+</body>
 
+
 
+</html>

+ 45 - 0
3_js基础/综合练习3编程题9.html
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@@ -0,0 +1,45 @@
 
+<!DOCTYPE html>
 
+<html lang="en">
 
+
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+
 
+<body>
 
+    <script>
 
+        //定义了一次游戏函数  验证游戏是否赢了
 
+        function playGame(){
 
+            var randomArr = []
 
+            for(var i=0;i<3;i++){
 
+                randomArr.push(Math.floor(Math.random()*9)+1)
 
+            }
 
+            if(randomArr.includes(8)){
 
+                return true;
 
+            }else{
 
+                return false;
 
+            }
 
+        }
 
+
 
+        var playCount = 0;
 
+        var winCount = 0;
 
+        while(true){
 
+            var isPlay = false;
 
+            var isWin = playGame();
 
+            playCount++;
 
+            if(isWin){
 
+                winCount++;
 
+                isPlay = window.confirm("你赢了！你一共玩了"+playCount+"次赢了"+winCount+"次,获胜率是"+winCount/playCount*100);
 
+            }else{
 
+               isPlay = window.confirm("你输了!你一共玩了"+playCount+"次赢了"+winCount+"次,获胜率是"+winCount/playCount*100);
 
+            }
 
+            if(!isPlay){
 
+                break;
 
+            }
 
+        }
 
+
 
+    </script>
 
+</body>
 
+
 
+</html>