如何申报C字符串 [英] How to declare strings in C

问题描述

可能重复：结果
  内存分配的char *和char []

谁能给我解释一下什么是code

Can anyone explain me what is a difference between these lines of code

char *p = "String";
char p2[] = "String";
char p3[7] = "String";

在什么情况下，我应该用上面的每？

In what case should I use each of the above ?

推荐答案

此链接应该满足你的好奇心。

This link should satisfy your curiosity.

基本上（忘记你的第三个例子是坏的），1和2之间的不同在于1的指针数组分配空间。

Basically (forgetting your third example which is bad), the different between 1 and 2 is that 1 allocates space for a pointer to the array.

但在code，你可以操纵他们为指针都是一样的 - 唯一的事情，你不能重新分配第二个

But in the code, you can manipulate them as pointers all the same -- only thing, you cannot reallocate the second.

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