C语言指针：定义，使用及计算指针大小

深碍√TFBOYSˉ_ 2023-10-05 11:09 9阅读 0赞

## 关于指针的运算符 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70_pic_center]  
![在这里插入图片描述][20201007162620167.png_pic_center]

## 代码示例：定义指针 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70_pic_center 1]  
运行结果：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70_pic_center 2]

## 图示 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70_pic_center 3]

## 指针本身所占大小sizeof() ##

![在这里插入图片描述][20201007163147358.png_pic_center]  
代码证明：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70_pic_center 4]  
基本数据类型的指针都占4个字节：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70_pic_center 5]

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[20201007162620167.png_pic_center]: https://img-blog.csdnimg.cn/20201007162620167.png#pic_center
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[20201007163147358.png_pic_center]: https://img-blog.csdnimg.cn/20201007163147358.png#pic_center
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