連結串列的清空操作，就是要銷燬掉除表頭結點之外的所有結點。只要寫個迴圈來銷燬結點就可以，注意，要先記錄當前結點的後繼結點，然後再銷燬當前結點。

參考程式碼：

#define OK 1

#define ERROR 0

typedef int ElemType;

typedef struct SqList{

ElemType elem;

struct SqList *next;

}SqList;

int ClearList(SqList *list)

{

SqList *temp, *head = list;

if (list == NULL)

return ERROR;

list = list->next;

while (list != NULL)

{

temp = list->next;

free(list);

list = temp;

}

head->next = NULL;

return OK;

}