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我(在一点帮助下)用 C++ 制作了一个单链表,它将输入的元素从最小到最大排序。我想从同一个值中删除几个元素,但是当代码似乎删除更多时,我使用的 Delete 方法似乎只能删除一个。我尝试使用一个调用 Delete 方法的循环来删除几个元素,当它删除一个元素时,它就变成了分段错误。我会很感激一些帮助。谢谢你。

void List::Append(float time, char type, int cell, long id) {

// Create a new node
Node* newNode = new Node();
newNode->SetTime(time);
newNode->SetType(type);
newNode->SetCell(cell);
newNode->SetId(id);
newNode->SetNext(NULL);

// Create a temp pointer
Node *tmp = head;

if ( tmp ) {
    if ( tmp->Time() < newNode->Time() ) {
        newNode->SetNext(tmp);
        head = newNode;
    }
    else {
        // Nodes already present in the list
        // Parse to end of list anytime the next data has lower value
        while ( tmp->Next() && tmp->Next()->Time() >= newNode->Time() ) {
            tmp = tmp->Next();
        }

        // Point the lower value node to the new node
        Node* _next = tmp->Next();
        tmp->SetNext(newNode);
        newNode->SetNext(_next);
    }
}
else {
    // First node in the list
    head = newNode;
}

}

void List::Delete(long id) {

// Create a temp pointer
Node *tmp = head;

// No nodes
if ( tmp == NULL )
    return;

// Last node of the list
if ( tmp->Next() == NULL ) {
    delete tmp;
    head = NULL;
}
else {
    // Parse thru the nodes
    Node *prev;
    do {
        if ( tmp->Id() == id ) break;
        prev = tmp;
        tmp = tmp->Next();
    } while ( tmp != NULL );

    // Adjust the pointers
    prev->SetNext(tmp->Next());

    // Delete the current node
    delete tmp;
}

}

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1 回答 1

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在列表::删除代码中:

 if ( tmp->Id() == id ) break;<--------

如果您break,则 do{}while 循环结束。导致只有1个删除。

于 2012-12-27T03:32:13.097 回答