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<?php
//--------------------
// »ù±¾Êý¾Ý½á¹¹
//--------------------
//¶þ·Ö²éÕÒ£¨Êý×éÀï²éÕÒij¸öÔªËØ£©
function bin_sch($arr, $low, $high, $k) {
if($low<=$high) {
$mid = intval(($low+$high)/2);
if($arr[$mid] == $k) {
return $mid;
} elseif($k<$arr[$mid]) {
return bin_sch($arr,$low,$mid-1,$k);
} elseif($k>$arr[$mid]) {
return bin_sch($arr,$mid+1,$high,$k);
}
}
return -1;
}
//˳Ðò²éÕÒ£¨Êý×éÀï²éÕÒij¸öÔªËØ£©
function seq_sch($array, $n, $k) {
$array[$n] = $k;
for($i=0; $i<$n; $i++) {
if($array[$i]==$k) {
break;
}
}
if($i<$n) {
return $i."The Element is here";
} else {
return '-1Sorry';
}
}
for($i=0;$i<1000000;$i++) {//²âÊÔÊý×é
$arr1[$i] = $i+1;
}
$time_start = explode(" ",microtime());
seq_sch($arr1,1000000,895624);
$time_end = explode(" ", microtime());
echo "˳Ðò²éÕÒ·¨ËùÐèÒªµÄʱ¼ä:";
echo ($time_end[0]+$time_end[1] - $time_start[0]-$time_start[1])."<br>";////²âÊÔ˳Ðò²éÕÒ·¨ËùÐèÒªµÄʱ¼ä
echo '----------------------------------——————'.'<br>';
$time_start = explode(" ",microtime());
bin_sch($arr1,0,999999,895624).'<br>';
$time_end = explode(' ', microtime());
echo "¶þ·Ö²éÕÒ·¨ËùÐèÒªµÄʱ¼ä:";
echo ($time_end[0]+$time_end[1] - $time_start[0]-$time_start[1]).'<br>';//²âÊÔ¶þ·Ö²éÕÒ·¨ËùÐèÒªµÄʱ¼ä
?>
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