8579 链式线性表的基本操作

8579 链式线性表的基本操作
编写算法,创建一个含有n个元素的带头结点的单链表L并实现插入、删除、遍历操作。本题目提供部分代码,请补全内容。

#include
#include
#define ERROR 0
#define OK 1
#define ElemType int

typedef struct LNode
{
int data;
struct LNode *next;
} LNode,*LinkList;

int CreateLink_L(LinkList &L,int n)
{
// 创建含有n个元素的单链表
LinkList p,q;
int i;
ElemType e;
L = new LNode;
L->next = NULL; // 先建立一个带头结点的单链表
q = L;
for (i=0; i {
scanf(“%d”, &e);
p = new LNode; // 生成新结点
// 请补全代码
p->data = e;
p->next = NULL;
q->next = p;
q = q->next;
}
return OK;
}

int LoadLink_L(LinkList &L)
{
// 单链表遍历
LinkList p = L->next;
if(p == NULL)printf(“The List is empty!”); // 请填空
else
{
printf(“The LinkList is:”);
while(p != NULL) // 请填空
{
printf(“%d “,p->data);
p = p->next; // 请填空
}
}
printf(”\n”);
return OK;
}

int LinkInsert_L(LinkList &L,int i,ElemType e)
{
// 算法2.9
// 在带头结点的单链线性表L中第i个位置之前插入元素e
// 请补全代码
LinkList p = L,s;//p指向头结点
int j=0;
while( p && (j {
p=p->next;
j++;
}
if(!p||j>i-1) return ERROR;
s=new LNode;
s->data=e;
s->next=p->next;
p->next=s;
return OK;
}

int LinkDelete_L(LinkList &L,int i, ElemType &e)
{
// 算法2.10
// 在带头结点的单链线性表L中,删除第i个元素,并用e返回其值
// 请补全代码
LinkList p = L,q;
int j=0;
while( p->next && (j {
p=p->next;
j++;
}//找第i个,p指向其前驱
if( !(p->next) || (j>i-1) ) return ERROR;
q=p->next;
p->next=q->next;//跳过要删除的元素
e=q->data;
delete q;
return OK;
}

int main()
{
LinkList T;
int a,n,i;
ElemType x, e;
printf(“Please input the init size of the linklist:\n”);
scanf(“%d”,&n);
printf(“Please input the %d element of the linklist:\n”, n);
if( CreateLink_L(T,n) == OK ) // 判断链表是否创建成功,请填空
{
printf(“A Link List Has Created.\n”);
LoadLink_L(T);
}
while(1)
{
printf(“1:Insert element\n2:Delete element\n3:Load all elements\n0:Exit\nPlease choose:\n”);
scanf(“%d”,&a);
switch(a)
{
case 1:
scanf(“%d%d”,&i,&x);
if(LinkInsert_L(T,i,x) == ERROR) printf(“Insert Error!\n”); // 判断i值是否合法,请填空
else printf(“The Element %d is Successfully Inserted!\n”, x);
break;
case 2:
scanf(“%d”,&i);
if(LinkDelete_L(T,i,e) == ERROR) printf(“Delete Error!\n”); // 判断i值是否合法,请填空
else printf(“The Element %d is Successfully Deleted!\n”, e);
break;
case 3:
LoadLink_L(T);
break;
case 0:
return 1;
}
}
}

输入格式
测试样例格式说明:
根据菜单操作:
1、输入1,表示要实现插入操作,紧跟着要输入插入的位置和元素,用空格分开
2、输入2,表示要实现删除操作,紧跟着要输入删除的位置
3、输入3,表示要输出顺序表的所有元素
4、输入0,表示程序结束

输入样例
3
3 6 9
3
1
4 12
2
1
3
0

输出样例
Please input the init size of the linklist:
Please input the 3 element of the linklist:
A Link List Has Created.
The LinkList is:3 6 9
1:Insert element
2:Delete element
3:Load all elements
0:Exit
Please choose:
The LinkList is:3 6 9
1:Insert element
2:Delete element
3:Load all elements
0:Exit
Please choose:
The Element 12 is Successfully Inserted!
1:Insert element
2:Delete element
3:Load all elements
0:Exit
Please choose:
The Element 3 is Successfully Deleted!
1:Insert element
2:Delete element
3:Load all elements
0:Exit
Please choose:
The LinkList is:6 9 12
1:Insert element
2:Delete element
3:Load all elements
0:Exit
Please choose:

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