查询词典 null function

If the list is empty a NULL pointer is returned.

如果链表本空，则返回一个 NULL 指针。

Hence, initializing a pointer to NULL is equivalent to initializing it to 0

因此，把指针初始化为 NULL 等效于初始化为 0 值

If the system is unable to allocate memory for a new instance of the application, the returned instance pointer will be NULL.

如果系统无法为应用程序的新实例分配内存，返回的实例指针将是NULL。

A NULL pointer and an empty string are considered different .

NULL 指针和空字符串是不同的。

Removing an element not in a set will result in a null pointer being passed to delete.

删除一个不在set 中的元素会导致一个空指针被传递给delete。

The NULL argument is a pointer for the type, in this case it isn't used, since the method is declared void.

空参数是一个类型的指针，这是在不使用情况，因为该方法是宣布无效。

It is fine to delete a null pointer.

所以，删除之前检查是否为空是多余的

RETURNS: NULL on error, a pointer to the loaded file if OK.

返回：空的错误，是对加载的文件指针，如果确定。

Most bugs show themselves in NULL pointer dereferences or by the use of other incorrect pointer values.

大多数bug通常是因为废弃了一个NULL指针或者使用了错误的指针值。

In a case in which the list does not contain a node, the head pointer is NULL.

当表中不包含任个结点时，头指针就是 NULL 。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。