补觉中...
1.不一样的乘法表:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>倒立的乘法表</title>
</head>
<body>
<script type="text/javascript">
var k = 9;
var str = "";
str += "<table width=‘600‘ border=‘1‘ rules=‘all‘ align=‘center‘>";
for(var k = 9; k>0; k--)
{
for(var i = k; i>0; i--)
{
str += "<tr>";
for(var j = 9; j>0; j--)
{
str += "<td>"+j+‘*‘+i+‘=‘+(j*i)+"</td>";
if(i>1)
{
i--;
}else
{
break;
}
}
str += "</tr>";
}
}
str += "</table>";
document.write(str);
</script>
</body>
</html>
效果图:
2.数字图案:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>数字图形</title>
</head>
<body>
<script type="text/javascript">
var a = window.prompt("请输入10以内的一个数");
for(var i=a; i>0; i--)
{
for(var j=i; j>0; j--)
{
document.write(i);
}
document.write("<br>");
}
for(var m=2; m<=a; m++)
{
for(var n=1; n<=m; n++)
{
document.write(m);
}
document.write("<br>");
}
</script>
</body>
</html>
效果图:
3.二位数组中的平均值和最大值:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>二维数组</title>
</head>
<body>
<script type="text/javascript">
var arr = [
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
]
var a = 0;
var max = arr[0][0];
for(var i=0; i<arr.length; i++)
{
for(var j = 0, length2 = arr[i].length; j < length2; j++){
a += arr[i][j];
if(max<arr[i][j]){
max = arr[i][j];
}
}
}
document.write(a/(arr.length*length2)+"是平均值.<br>");
document.write(max+"是最大值<br>");
</script>
</body>
</html>
时间： 2025-01-02 15:10:10