? /** * 二分算法查找 * @param array $array 要查找的数组 * @param int $min_key 数组的最小下标 * @param int $max_key 数组的最大下标 * @param mixed $value 要查找的 * @return boolean */ function bin_search($array,$min_key,$max_key,$value){ if(
/**
* 二分算法查找
* @param array $array 要查找的数组
* @param int $min_key 数组的最小下标
* @param int $max_key 数组的最大下标
* @param mixed $value 要查找的值
* @return boolean
*/
function bin_search($array,$min_key,$max_key,$value){
if($min_key
$key = intval(($min_key+$max_key)/2);
if($array[$key] == $value){
return true;
}elseif($value
return bin_search($array,$min_key,$key-1,$value);
}else{
return bin_search($array,$key+1,$max_key,$value);
}
}else{
return false;
}
}
//现在我们来测试一下这个函数
$array = array(1,22,23,45,58,10,12,2,4,6);
$value = 45;
$min_key = min(array_keys($array));
$max_key = max(array_keys($array));
if(bin_search($array,$min_key,$max_key,$value)){
echo "Search Success!";
}else{
echo "Search Faliure!";
}
?>

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