逐行读取文件以构造

Question

我想读取一个如下所示的文件：

Spyros 1
George 2
John 3

我想将每个学生存储在一个结构中：

typedef struct studentR *student;
struct studentR{
   char name[MAXSTRING];
   int id;
   student next;
};

我已经编写了以下代码，它可以满足我的要求，但仅限于第一行。我怎样才能把它移到下一行？

while(fscanf(fp, "%s %d", st->name, &st->id) != EOF){
    l = list_push_back(l, st->name, st->id);
}

这里是list_push_back

//enters the new student in the end of the list
list list_push_back(list l, char *name, int id){
    student new_student = (student)malloc(sizeof(struct studentR));
    assert(new_student);

    strcpy(new_student->name, name);
    new_student->id = id;
    new_student->next = NULL;
    
    //push payload(stsudent data) at the top if the list is empty
    if (list_isempty(l))
    {
        l->head = new_student;
        l->tail = new_student->next;
        l->size++;
    }else{
        //push the payload(student data) at the bottom if the list is NOT empty
        student last = (student)malloc(sizeof(struct studentR));
        assert(last); 
        last->next = new_student;
        l->tail = new_student;
        l->size++;
    }

    return l;
}

Answer 1

该代码的错误包括：

永远不要在添加到空列表的情况下正确设置 tail。
add-to-not-empty-list 情况下的内存泄漏（两次）。
在 add-to-not-empty-list 的情况下添加一个节点，但在这样做时会泄漏内存。

该函数应如下所示：

list list_push_back(list l, const char *name, int id)
{
    student new_student = malloc(sizeof *new_student);
    assert(new_student);

    strcpy(new_student->name, name);
    new_student->id = id;
    new_student->next = NULL;

    if (l->size == 0)
    {
        l->head = new_student;
    }
    else
    {
        l->tail->next = new_student;
    }
    l->tail = new_student;
    l->size++;

    return l;
}

那是全部。

逐行读取文件以构造

Read a file line by line to struct

c

file-io

struct

file

list