为什么（如何）我们可以使用char *来存储字符串？ [英] Why(How) we can use char* to store a string?

问题描述

嗨
为什么这段代码有效？

Hi Why this code works?

char* ch="hello";
cout<<ch;

我以为我们只能存储单个字符（char ch ='a'或'字符容器中的3'或'$'）或ASCI编号（char ch = 65）。但是当我使用字符指针时，我可以在其中存储一个字符串。这怎么可能？还有其他我不知道的关于字符的内容吗？

I thought we can only store single characters (char ch='a' or '3' or '$') or ASCI numbers (char ch= 65) in a character container. But when I use a character pointer, I can store a string in it. How is this possible? And is there other things I don't know about chars?

推荐答案

'）或字符容器中的ASCI编号（char ch = 65）。但是当我使用字符指针时，我可以在其中存储一个字符串。这怎么可能？还有其他我不了解的关于字符的事情吗？

') or ASCI numbers (char ch= 65) in a character container. But when I use a character pointer, I can store a string in it. How is this possible? And is there other things I don't know about chars?

你似乎不知道C / C ++中指针和字符串文字的基础知识。

I建议学习一些关于C / C ++的教程，例如 Character Sequences [ ^ ]和指针 [ ^ ]。或者甚至更好，浏览 C ++语言的所有部分[ ^ ]教程（或任何类似的参考资料）。



对于特定情况：

1. hello是一个由6个字符组成的序列：h，e，l，l，o加上终止零字符。

2.字符序列可通过序列第一个字符的内存地址访问

3.该地址存储在指针变量中

4.在C / C ++中你写一个指向类型的指针为 type * var = ...; ，例如 char * s =hello;

5.将指向的指针命名为 ch 愚弄所有人 - 将其命名为问候语或类似



干杯
Andi

You seem to not know the basics of pointers and string literals in C/C++.
I suggest to work through some tutorial on C/C++, e.g., Character Sequences[^] and Pointers[^]. Or even better, go through all parts of the C++ Language[^] tutorial (or any similar reference).

For the particular case:
1. "hello" is a sequence of 6 characters: h,e,l,l,o plus the terminating zero character.
2. that sequence of characters is accessible through the memory address of the first character of the sequence
3. that address is stored in a pointer variable
4. in C/C++ you write a pointer to a type as type * var = ...;, e.g. char * s = "hello";
5. naming a pointer to character as ch is fooling everyone - name it greeting or alike

Cheers
Andi

char * 与 char 不同。 char * 表示指向包含字符串的存储位置的指针。

char只是存储字符值。

char * is different from char. char * represents a pointer to a storage location that holds a string.
char is simply storing the character value.

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