标签：开始 color error 错误提示 required 过滤 pat ror pst
Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0
Fatal error: Unknown: Failed opening required ‘D:/phpStudy/WWW/褰㈢姸鎵撳嵃.php‘ (include_path=‘.;C:\php\pear‘) in Unknown on line 0
<!DOCTYPE html>
<html>
<head>
<title>形状打印</title>
<meta http-equiv = "content-type" content="text/html; charset = utf-8 ">
</head>
<body>
<?php
$a=10;$b=10;//a，长。b，宽。
for ($y=0; $y <= $b; $y++) { //向下扫描
for ($x=0; $x <= $a; $x++) { //向右扫描
if ( $b/2-($b/$a)*$x <= $y &&
($b/$a)*$x-$b/2 <= $y &&
($b/$a)*$x+$b/2 >= $y &&
3/2*$b-($b/$a)*$x >= $y) {
echo "*";
//建立直角坐标系，当当前扫描点(x,y)在四条菱形边上或内部时，打印*号
}
else echo " ";
//注意：浏览器会过滤过滤多余的空格。打印空格请用左示方法
}
echo "</br>";//换行
}
?>
</body>
</html>
$b/2-($b/$a)*$x == $y || ($b/$a)*$x-$b/2 == $y || ($b/$a)*$x+$b/2 == $y || 3/2*$b-($b/$a)*$x == $y
运行结果如下：
运行成功！
标签：开始 color error 错误提示 required 过滤 pat ror pst
原文地址：http://www.cnblogs.com/maguariji/p/7205130.html
