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<>前言
本人是一个刚刚上路的IT新兵,菜鸟!分享一点自己的见解,如果有错误的地方欢迎各位大佬莅临指导,如果这篇文章可以帮助到你,劳请大家点赞转发支持一下!
<>一、'\0’是什么？
‘\0’ 是转义字符
，为了告诉编译器’\0’是空字符，而不是字符0.也就是结束标志,’\0’是字符串中的结束标志,如果没有’\0’这个结束标志,那么在输出的时候就有可能会出现乱码问题;
字符’0’对应的二进制为00110000，而’\0’对应的二进制为00000000;
<>二、'\0’的作用:
将字符串存储进字符数组时,有两种方式(将字符abc存储进字符数组);
char arr1[] = "abc";
这是第一种存储方式,暂且称它为老大;
char arr2[]={'a','b','c'};
这是第二种存储方式,称之为老二;
老大和老二都是将三个字符abc储存进字符数组;
但是他们会被区别对待;
咱们来看这段代码的运行结果:
结果表明:老大没问题,非常健康;老二就出现了乱码的情况;这是因为他们被区别对待了;虽然他们都是将字符"abc"存储进字符数组;但是老大在存储的时候,编译器会自动给把’\0’存储进去,不需要老大自己动手,编译器就帮他存了,\而老二就是你不存就乱码,存了就正常;
出现乱码情况是因为,在输出字符串时,找不到’\0’这个结束标志,就会找到什么就输出什么,直到找到’\0’;
但是这种情况也仅仅会出现在没有设置字符数组长度的时候,一但你设置了字符数组的长度,那么编译器就会把老大老二一视同仁了;
<>三、'\0’的一些自身属性
'\0’大小是多少,长度是多少呢?
咱们用arr1数组来测试
每个字符占一个字节,而arr1一共是四个字节的大小,说明’\0’的大小是一个字节;
而在计算长度的时候不会把’\0’算上,
既然’\0’也占一个字节,如果我不给他留这一个字节的空间,老大的存储方式还能正常运行吗
不给’\0’留一个字节的位置,编译器都没办法把’\0’给你存进去,也会出现乱码情况;
以上就是今天要分享的一些关于’\0’的见解了，如果各位朋友有不同的见解,欢迎在评论区讨论,指正;
谢谢!!!
写在最后:有人要卷死我,我必反卷之! ! !
