数组和指针数组之间的区别编译一次？ [英] Difference between an array and a pointer to an array once compiled?

问题描述

 无效M（）{
    烧焦一个[​​] = {1，2，3，4，5，6，7，8，9};
    炭（* C）[3] [3] =（炭（*）[3] [3]）一个;
    的printf（％d个\\ N，* C [0] [0]）;
}
 

有关实例，在该功能的变量 A 指向存储器中的行9的整数的位置。

但是关于什么C ？请问 C 指向一个内存位置指向一个位置保存在连续9的整数内存？

所以，从技术上来说，是 C 单层指针或双层指针？

应该不是我上面说的是真的吗？为什么当我执行以下功能：

 无效M（）{
    烧焦一个[​​] = {1，2，3，4，5，6，7，8，9};
    炭（* C）[3] [3] =（炭（*）[3] [3]）一个;
    的printf（％d个\\ N，* C [0] [0]）;
    的printf（一...％P \\ NC ...％P \\ N，A，C）;
}
 

A和C都指向同一个位置吗？如果不是C是一个双层指针，一个是指向一个内存位置？

解决方案

  

变量 A 指向内存中连续9的整数位置。

没有。变量 A 的是的内存中的位置，一排9的整数。 A 仅仅是该位置的名称。

  

ç是否指向一个内存位置指向一个位置保存9整数连续记忆？

没有。 C 的是的内存中的一个位置，它指向一个位置保存在连续9整数内存。 C 是包含指针位置的名称。

  

所以，从技术上来说，是C单层指针或双层指针？

单。

void m() {
    char a[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
    char(*c)[3][3] = (char (*)[3][3])a;
    printf("%d\n", *c[0][0]);
}

For instance, in this function the variable a points to a location in memory with 9 integers in a row.

But what about c? Does c point to a location in memory which points to a location in memory that holds 9 integers in a row?

So, technically, is c a single layer pointer or a double layer pointer?

Shouldn't what I said above be true? How come when I execute the below function:

void m() {
    char a[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
    char(*c)[3][3] = (char (*)[3][3])a;
    printf("%d\n", *c[0][0]);
    printf("a...%p\nc...%p\n", a, c);
}

a and c both point to the same locations? Shouldn't c be a double layer pointer, and a be a pointer to a location in memory?

解决方案

the variable a points to a location in memory with 9 integers in a row.

No. The variable a is a location in memory with 9 integers in a row. a is just a name for that location.

Does c point to a location in memory which points to a location in memory that holds 9 integers in a row?

No. c is a location in memory which points to a location in memory that holds 9 integers in a row. c is a name for the location containing the pointer.

So, technically, is c a single layer pointer or a double layer pointer?

Single.

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