php学习笔记之 函数声明(二)

60) 
return "及格"; 
else 
return "不及格"; 
} 
function java($java) 
{ 
if($java>60) 
return "及格"; 
else 
return "不及格"; 
} 
function dotnet($dotnet) 
{ 
if($dotnet>60) 
return "及格"; 
else 
return "不及格"; 
} 
$total=$php $java $dotnet; 
$agv=$total/3; 
echo "你的php成绩是{$php}分，".php($php)."
"; 
echo "你的java成绩是{$java}分，".java($java)."
"; 
echo "你的dotnet成绩是{$dotnet}分，".dotnet($dotnet)."
"; 
echo "你的总分是：{$total}
"; 
echo "你的平均分是：{$agv}
"; 
} 
score(50,90,70); 
//递归函数 
function demo($num) 
{ 
echo $num."
"; 
if($num>0) 
demo($num-1); 
else 
echo "--------------------------------
"; 
echo $num."
"; 
} 
demo(10); 
function total($dirname,&$dirnum,&$filename) 
{ 
$dir=opendir($dirname); 
readdir($dir)."
"; 
readdir($dir)."
"; 
while($filename=readdir($dir)) 
{ 
$newfile=$dirname."/".$filename; 
echo $filename."
"; 
if(is_dir($filename 
} 
} 
$dirnum=0; 
$filenum=0; 
total("c:/windows",$dirnum,$filenum); 
echo "目录总数：".$dirnum."
"; 
echo "文件总数：".$filenum."
"; 
?>