如何从实现文件访问头文件中定义的结构？
如何访问 .c 文件中头文件中定义的结构（如 struct common）？我们将头文件包含在.c文件中，然后我们就可以直接使用 struct common C;？
头文件-new_algo.h
#ifndef NEW_ALGO_H_
#define NEW_ALGO_H_
#endif /* NEW_ALGO_H_ */
struct common{
float count;
//other variables
};
main.c <代码>
#include "new_algo.h"
int main()
{
typedef struct common myStruct;
myStruct* S;
S->count = 0;//when I do this segmentation fault occurs
//this is the error I get in eclipse
/* Thread [1] 0 (Suspended : Signal : SIGSEGV:Segmentation fault)
main() at E:/Namratha//trial/.settings/..\\src\\main.c:44 0x401443*/
}
<代码>
How do you access a struct say struct common, that is defined in a header file, in a .c file? We'll include the header file in the .c file and then can we directly usestruct common C;?
header file-new_algo.h
#ifndef NEW_ALGO_H_
#define NEW_ALGO_H_
#endif /* NEW_ALGO_H_ */
struct common{
float count;
//other variables
};
main.c
#include "new_algo.h"
int main()
{
typedef struct common myStruct;
myStruct* S;
S->count = 0;//when I do this segmentation fault occurs
//this is the error I get in eclipse
/* Thread [1] 0 (Suspended : Signal : SIGSEGV:Segmentation fault)
main() at E:/Namratha//trial/.settings/..\\src\\main.c:44 0x401443*/
}
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评论（2）
嘿嘿，这个错误不是访问控制造成的。
在使用 struct 变量之前，您应该为其分配空间，例如
myStrcut *s = (myStrcut *)malloc(sizeof(myStruct))然后分配：
s->count = 0请尝试一下。
Hey, the fault error is not resulted from access control.
Before use struct varible, you should malloc space for it like
myStrcut *s = (myStrcut *)malloc(sizeof(myStruct))then assign:
s->count = 0Please have a try.
是的，这是正确的。只需将标头包含在源文件中并为结构创建实例即可。
header.h
.c
Yes, it's correct. Just include the header in the source file and create the instance for the struct.
header.h
.c