分配到一个结构数组失败，＆QUOT;错误：初始元素不是常数QUOT; [英] Assignment to a struct array failed with "error: initializer element is not constant"

问题描述

当我试图初始化包含结构元素的全局数组，我得到了错误：初始元素不是常量

When I tried to initialize a global array that contains structure elements, I got the " error: initializer element is not constant"

A.H

#define MAX_MSG_NUM 20
#define NAME_SIZE   15
#define MAX_QUE_NUM  10

typedef struct {
   int         index;
   int         tid;
   int         front;
   int         rear;
   char        name[NAME_SIZE];
   char        msgbuf[MAX_MSG_NUM];
} THREAD;

typedef enum {
   I1        = 0,
   I2        = 1,
   I3        = 2,
   I4        = 3
} DMTHREAD;

交流转换器

THREAD   a[MAX_MSG_NUM];
THREAD   b[MAX_MSG_NUM];
THREAD   c[MAX_MSG_NUM];

THREAD   T[MAX_QUE_NUM] = {
   {I1,   0, 0, 0, "CONFIG1",      a[MAX_MSG_NUM]},
   {I2,   0, 0, 0, "CONFIG2",      b[MAX_MSG_NUM]},
   {I3,   0, 0, 0, "CONFIG3",       c[MAX_MSG_NUM]},
   0
};

---

GCC编译器。

---

GCC compiler.

bash-3.2$ gcc -g a.h a.c
a.c:8: error: initializer element is not constant
a.c:8: error: (near initialization for 'T[0].msgbuf[0]')
a.c:9: error: initializer element is not constant
a.c:9: error: (near initialization for 'T[1].msgbuf[0]')
a.c:10: error: initializer element is not constant
a.c:10: error: (near initialization for 'T[2].msgbuf[0]')

感谢您的帮助。

通过你的回答启发

，我改变了code和现在工作得很好。

Thanks for help.

Enlightened by your answers, I changed the code and it works fine now.

MSG   T[MAX_QUE_NUM] = {
           {I1,   0, 0, 0, "CONFIG1",      {0}},
           {I2,   0, 0, 0, "CONFIG2",      {0}},
           {I3,   0, 0, 0, "CONFIG3",      {0}}, 
           0,
    }

感谢您的答案。

推荐答案

A [MAX_MSG_NUM] 确实是不恒定的。它还表示发实例，这恰好是先前定义的数组之外，并且​​不匹配你应该通过有类型（的char [ ] ）。

a[MAX_MSG_NUM] is indeed non-constant. It also denotes a Thread instance, which happens to be outside the array you defined earlier, and does not match the type you should pass there (char[]).

因此​​，它的是错误这么多层次。

So it is wrong on so many levels.

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