c - 将新节点添加到c中的现有链表

Question

当我尝试向我的链表中添加一个新节点时，编译器停止工作并且无法添加该节点，我无法找出问题是在逻辑中还是在语法中

struct Record* CreateNode() {
    struct Record* PointerToRecord ;
    PointerToRecord = (struct Record*) malloc(sizeof(struct Record*));
    if (PointerToRecord) {
        PointerToRecord->C = FillDataOfContacts();
        PointerToRecord->Next = NULL;
        PointerToRecord->Prev = NULL;
    }
    return PointerToRecord  ;
}

struct Record* AddNode() {
    if (Head == NULL && Tile == NULL) {
        Head = Tile = CreateNode();
    } else {
        struct Record* Pointer ;
        Pointer = CreateNode();
        Tile->Next = Pointer ;
        Pointer->Prev = Tile ;
        Pointer->Next = NULL;
        Tile = Pointer ;
    }
}

Answer 1

在您的 struct Record* CreateNode() 函数中，您有:

PointerToRecord = (struct Record*) malloc(sizeof(struct Record*));

在这里，您没有分配足够的内存来存储 struct record，而是分配内存来存储 struct record*

尝试这样分配:

PointerToRecord = (struct Record*) malloc(sizeof(struct Record));

此外，您不需要转换 malloc 的返回值: Here's why (点击)

所以你可以用下面的方式分配你的指针

PointerToRecord = malloc(sizeof(struct Record));