c - 访问嵌套体中内部结构的元素

Question

我们不能访问内部结构的元素吗？(在这种情况下是dept)。

当我尝试初始化 dept 结构的值时，出现上次提到的错误。

#include <stdio.h>
#include <string.h>
struct employe
{
    char name[10];
    int i;
    struct dept
    {
        char name[10];
        int uniq_num;
    }d;
}e;
int main()
{
strcpy(d.name, "CS");
strcpy(e.d.name, "Computer Science");
printf("The dept name: %s \n", d.name);
printf("Employee dept name: %s \n", e.d.name);
getchar();
return 0;
}

错误 -

"example9.c", line 18: undefined symbol: d
"example9.c", line 18: warning: left operand of "." must be struct/union object
"example9.c", line 18: cannot access member of non-struct/union object
"example9.c", line 20: warning: left operand of "." must be struct/union object
"example9.c", line 20: cannot access member of non-struct/union object

Answer 1

你有(错误？)使用 d.name 而不是 e.name 例如第一个 strcpy 调用。

当您执行 e.d.name 时，您使用正确的语法在一个 strcpy 和 printf 调用中访问嵌套结构。