-1
#include <stdio.h>
#include <stdlib.h>
typedef struct nodeNum
{
int num;
struct nodeNum *next;
} t_nodeNum;
// Functions declaration ----------------------------
int menu(); // display menu and return choice
t_nodeNum* addition(t_nodeNum *node, int n);
void print_list(t_nodeNum *node);
// ----------------------------------------------------
// Main program to test link list functions
int main()
{
int choice;
t_nodeNum *pnode = NULL;
t_nodeNum *head = NULL;
t_nodeNum *temp = NULL;
int numAdd = 0;
int len = 0;
int first = 1;
do
{
choice = menu();
switch (choice)
{
case 1:
{
printf("Please enter number : \n");
scanf("%d", &numAdd);
if (first)
{
pnode = (t_nodeNum *)malloc(sizeof(t_nodeNum));
if (pnode == NULL)
{
printf("\n Error in allocation\n");
exit(0);
}
pnode->num = numAdd;
pnode->next = NULL;
first = 0;
head = pnode;
}
pnode = addition(pnode, numAdd);
break;
}
case 4:
{
printf("\n Print List: ");
print_list(head);
break;
}
}
}
while (choice != 5);
return 0;
}
// function menu display menu and return choice
int menu()
{
int choice = 0;
do
{
printf("Please choose option to do: \n");
printf("1. addition\n");
printf("2. deletion\n");
printf("3. search\n");
printf("4. print\n");
printf("5. exit\n");
printf("\n option = ");
scanf("%d", &choice);
}
while (choice < 1 || choice > 5);
return choice;
}
// function addition to add item to linked list in recursion
t_nodeNum* addition(t_nodeNum *p, int numAdd)
{
int len = 0;
if (p == NULL)
{
p = (t_nodeNum *)malloc(sizeof(t_nodeNum));
if (p == NULL)
{
printf("\n Error in allocation\n");
exit(0);
}
p->num = numAdd;
p->next = NULL;
}
else
{
p = addition(p->next, numAdd);
}
return (p);
}
// function print_list to print linked list in recursion
void print_list(t_nodeNum *head)
{
printf("%d ", head->num);
if (head->next == NULL)
{
printf("\n");
return;
}
print_list(head->next);
}
沒有與另外功能也不能正常工作,以新的項目添加到鏈接列表,我不知道什麼是錯了,請幫 增加新的項目之後的問題,不要打印列表它僅僅顯示的第一個項目在遞歸C語言鏈接列表添加元素
遞歸是錯誤的方法。如果你有10,000個節點呢?所使用的堆棧內存將非常龐大。用指針迭代列表。 –
@SteveWellens這裏的所有遞歸都是尾遞歸,不是嗎? –
有三種情況需要處理:'p == NULL','p-> next == NULL',和'p-> next!= NULL'。 – user3386109