c++ - 结构体、链表、删除整个链表

Question

如何删除链表中的所有对象，在struct中实现？在我的删除功能 (loeschen) 之后显示漫画数字，我不知道我的指针在哪里。

struct domino {
int data1;
int data2;
domino *next;


};

int readSteine (){ //Reading from numbers from file
    FILE *file;


    if((file=fopen("datei.dat", "r") )==NULL) { /
        std::cout<<"File cant be open"<<std::endl;
        return 0;
    }else {
        int beginning;
        int temp;
        fscanf(file, "%d", &beginning);

        for(int i=0; i<beginning; i++) {
            domino *domino1= new domino;
             //if(i>0) temp2->next=domino1; 
            fscanf(file, "%i", &temp);
            domino1->data1=temp;
            fscanf(file, "%i", &temp);
            domino1->data2=temp;
            printf("[%d:%d]", domino1->data1, domino1->data2);
            domino1->next=0;
       }
    }return 0;
}

列表删除函数:

void deletelist (domino *head) {
    domino* tmp;
    while(head != 0) { 
        tmp=head->next;
        delete head;
        head=tmp;
    }

}


int main() {
    domino *pHead=NULL; 
domino s;
    readSteine();
    deletelist(pHead);
    std::cout<<s.data1<<"...."<<s.data2<<std::endl;

    return 0;
}

Answer 1

下面是一个清除方法的例子。思路是遍历链表，逐一删除节点。

Node *pDel = _pHead;

    /* Traverse the list and delete the node one by one from the head */
    while (pDel != NULL) {
        /* take out the head node */
        _pHead = _pHead->_pNext;
        delete pDel;
        /* update the head node */
        pDel = _pHead;
    }
    /* Reset the head and tail node */
    _pTail = _pHead = NULL;