C语言（十）：指向指针的指针

　　第一行表示num中存放的值是520；

　　第二行表示p中存放的是num的地址；

　　第三行表示解引用p得到num，最终得到值520；

　　第四行表示pp中存放p的地址；

　　第五行表示奖pp解引用一次得到p,p中存放num的地址；

　　第六行表示将pp解引用两次得到num，进而得到值520；

　　The first line indicates that the value stored in num is 520;

　　The second line indicates that the address stored in p is num;

　　The third line indicates that the reference p is dereferenced to obtain num, and the final value 520 is obtained;

　　The fourth line indicates the address where p is stored in the pp;

　　The fifth line represents the address where the num is stored in p, which is obtained by dereference of the award pp once;

　　The sixth line indicates that the value 520 is obtained by dereferencing pp twice to obtain num;

　　三、指针数组和指向指针的指针

　　指针数组：一个数组的元素值为指针则是指针数组。指针数组是一组有序的指针的集合。

　　指向指针的指针运用的好处：避免重复分配内存；只需要进行一处修改；代码的灵活性和安全性都显著提高

　　Pointer array: An array whose element value is a pointer is a pointer array. A pointer array is an ordered collection of pointers.

　　Advantages of using pointers to pointers: avoiding repeated memory allocation; Only one modification is required; Significant improvements in code flexibility and security

　　

　　四、数组指针和二维数组

　　如图所示，用指针间接访问一维数组：

　　As shown in the figure, use a pointer to indirectly access a one-dimensional array:

　　

　　但是指针不能间接访问二维数组，如图示：

　　However, pointers cannot indirectly access two-dimensional arrays, as shown in the figure:

　　

　　主要是因为二维数组是连续存放的，主要解释如图所示：

　　The main reason is that two-dimensional arrays are stored continuously. The main explanation is shown in the figure:

　　

　　

　　改进后用指针表示二维数组，如图示：

　　After improvement, a pointer is used to represent a two-dimensional array, as shown in the figure:

　　

　　详细解释链接：http://t.csdn.cn/Eicgf

　　Detailed explanation link: http://t.csdn.cn/Eicgf

　　结语：编者认为指针部分比较难懂，所以文章有什么问题还请大家提出来。

　　Conclusion: The editor thinks that the pointer part is difficult to understand, so if there is any problem in the article, please ask everyone to raise it.

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　　翻译：百度翻译

　　参考：《零基础入门学习C语言：带你学C带你飞》、哔哩哔哩小甲鱼视频、网络图片

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