c - 初始化结构体内部的数组

Question

我有这样的结构:

typedef struct
{
    union{
        int bytex[8];
        int bytey[7];
   }Value ;
   int cod1;
   int cod;
} test;

并且想要初始化常量test，如下所示:

const test T{
.Value.bytex = {0x11,0x22,0x33,0x44,0x11,0x22,0x33,0x44},
.cod1=0,
.cod=1,
};

我收到以下错误

Expected primary-expression before '.' token

但是这个初始化是正确的:

const test T{
{0x11,0x22,0x33,0x44,0x11,0x22,0x33,0x44},
.cod1=0,
.cod=1,
};

你有什么想法吗？

Answer 1

首先，这与重新组装结构/union 初始化语法并不接近。修复:

const test T = 
{
  .Value.bytex = { 0x11,0x22,0x33,0x44,0x11,0x22,0x33,0x44 },
  .cod1 = 0,
  .cod  = 1,
};

其次，如果您可以选择使用标准 C，则可以删除内部变量名称:

typedef struct
{
  union {
    int bytex[8];
    int bytey[7];
  };
  int cod1;
  int cod;
} test;

const test T = 
{
  .bytex = { 0x11,0x22,0x33,0x44,0x11,0x22,0x33,0x44 },
  .cod1 = 0,
  .cod  = 1,
};