[英]Accessing static global array from another file via function argument
Getting segmentation fault while accessing the data from a static global array from another file; 从另一个文件访问静态全局数组中的数据时遇到分段错误; the pointer was passed as a function argument.
指针作为函数参数传递。 The memory address shows the same from both file.
内存地址在两个文件中显示相同。
In file1.c 在file1.c中
static long long T[12][16];
...
/* inside some function*/
printf(" %p \n", T); // Check the address
func_access_static(T);
...
In file2.c 在file2.c中
void func_access_static(long long** t)
{
printf(" %p \n", t); // shows the same address
printf(" %lld \n", t[0][0]); // gives segmentation fault
}
Am I trying to do something that can't be done? 我是否在尝试做一些无法完成的事情? Any suggestion is appreciated.
任何建议表示赞赏。
**
is not the same thing than an array. **
与数组不一样。
Declare your function 声明你的功能
void func_access_static(long long t[][16])
or 要么
void func_access_static(long long (*t)[16])
This is what a 2 dimensional array int t[2][3]
looks like in memory 这就是二维数组
int t[2][3]
在内存中的样子
t
t[0] t[1]
+---------+---------+---------+---------+---------+---------+
| t[0][0] | t[0][1] | t[0][2] | t[1][0] | t[1][1] | t[1][2] |
+---------+---------+---------+---------+---------+---------+
Contiguous memory cells of int type
This is what a pointer on pointer int **
looks like in memory 这就是指针
int **
上的指针在内存中的样子
pointer pointer pointer
+---------+ +---------+---------+
| p | --> | p[0] | p[1] |
+---------+ +---------+---------+
| | Somewhere in memory
| | +---------+---------+---------+
| \---------->| p[1][0] | p[1][1] | p[1][2] |
| +---------+---------+---------+
|
| Somewhere else in memory
| +---------+---------+---------+
\-------------------->| p[0][0] | p[0][1] | p[0][2] |
+---------+---------+---------+
To access the content it's the same syntax but the operation is quite different. 要访问内容,语法是相同的,但操作却大不相同。
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