HiC：结构中的结构？

Question

this is my first time using structure within a structure. I encounter this error when I compile my program. error: field 'results' has incomplete type.

The error is referring to this line of code. -->struct result_t results;

Any help please? :) Thanks.

typedef struct {
char moduleCode[8];
char grade[3];
} result_t;

typedef struct {
char name[31];
struct result_t results;
} student_t;

Edit:

I changed my codes:

typedef struct {
char moduleCode[8];
char grade[3];
} result_t;

typedef struct {
char name[31];
result_t results;
} student_t;

and I got a new compilation error. error : subscripted value is neither array nor pointer.

The line of code that triggered that error is as follows. printf(" %-7s %-2s %d\\n", student.results[i].module_code, student.results[i].grade, student.results[i].mc);

Answer 1

Result is not an array. you should either change the structure student with:

typedef struct {
    char name[31];
    result_t results[MAX_NUM_RESULTS];
} student_t;

Or change the printf to:

printf(" %-7s %-2s %d\n", student.results.module_code, student.results.grade, student.results.mc);

It depends on how many possible results one student may have.

Answer 2

since you are using typedef use this

typedef struct {
char name[31];
result_t results;<---remove struct
} student_t;