算法描述:
⒈ 从第一个元素开始,该元素可以认为已经被排序
⒉ 取出下一个元素,在已经排序的元素序列中从后向前扫描
⒊ 如果该元素(已排序)大于新元素,将该元素移到下一位置
⒋ 重复步骤3,直到找到已排序的元素小于或者等于新元素的位置
⒌ 将新元素插入到下一位置中
⒍ 重复步骤2
$arr =array(123,0,5,-1,4,15);
function insertSort(&$arr){
//先默认第一个下标为0的数是排好的数 //把数后移 //插入(给$insertval找到位置了) insertSort($arr);
for($i=1;$i
$insertVal=$arr[$i];
//确定与前面比较的数比较
$insertIndex=$i-1;
//表示没有找到位置
while($insertIndex>=0 && $insertVal
$arr[$insertIndex+1]=$arr[$insertIndex];
$insertIndex--;
}
$arr[$insertIndex+1] = $insertVal;
}
}
print_r($arr);
?>

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