我是C的新手。我正在尝试使用链接列表交换两个节点。不确定有什么问题。它给我一个错误说
“temp”未声明。
另外,我可以在这段代码中更改不仅可以交换char而且还可以交换int吗?
struct lnode {
int some_line;
int count;
char* some_word;
struct lnode* next;
};
void swapNodes(struct lnode** head, struct lnode* n1, struct lnode* n2);
int main()
{
struct lnode* head = NULL;
struct lnode* node0 = newCharNode(&head,"this is");
struct lnode* node1 = newCharNode(&head,"programming");
swapNodes(&head,node0,node1);
getchar();
return 0;
}
void swapNodes(struct lnode** head, struct lnode* n1, struct lnode* n2)
{
struct lnode* current = (*head);
struct lnode* temp;
while((current != NULL) && (current->next != NULL))
{
temp->some_word = n1->some_word;
n1->some_word = n2->some_word;
n2->some_word = temp->some_word;
}
printf("%s %s",n1,n2);
current = (current->next)->next;
}
struct lnode* newCharNode(struct lnode** head, char* myword) {
struct lnode* new_node = (struct lnode*) malloc(sizeof(struct lnode));
new_node ->some_word = myword;
new_node ->next = (*head);
(*head) = new_node;
}
答案 0 :(得分:1)
在void swapNodes()
中temp->some_word
这里temp只是一个未初始化的指针,你无法进行这项任务。