本题要求实现一个将输入的学生成绩组织成单向链表的简单函数。
函数接口定义:
void input();
该函数利用scanf
从输入中获取学生的信息,并将其组织成单向链表。链表节点结构定义如下:
struct stud_node {
int num; /*学号*/
char name[20]; /*姓名*/
int score; /*成绩*/
struct stud_node *next; /*指向下个结点的指针*/
};
单向链表的头尾指针保存在全局变量head
和tail
中。
输入为若干个学生的信息(学号、姓名、成绩),当输入学号为0时结束。
裁判测试程序样例:
#include
#include
#include
struct stud_node {
int num;
char name[20];
int score;
struct stud_node *next;
};
struct stud_node *head, *tail;
void input();
int main()
{
struct stud_node *p;
head = tail = NULL;
input();
for ( p = head; p != NULL; p = p->next )
printf("%d %s %d\n", p->num, p->name, p->score);
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
1 zhang 78
2 wang 80
3 li 75
4 zhao 85
0
输出样例:
1 zhang 78
2 wang 80
3 li 75
4 zhao 85
void input() {
struct stud_node *p;
int num;
scanf("%d", &num);
while (num != 0) {
p = (struct stud_node *) malloc(sizeof(struct stud_node));
p->num = num;
scanf("%s%d", p->name, &p->score);
p->next = NULL;
if (head == NULL) head = p;
else tail->next = p;
tail = p;
scanf("%d", &num);
}
}
本题要求实现两个函数,一个将输入的学生成绩组织成单向链表;另一个将成绩低于某分数线的学生结点从链表中删除。
函数接口定义:
struct stud_node *createlist();
struct stud_node *deletelist( struct stud_node *head, int min_score );
函数createlist
利用scanf
从输入中获取学生的信息,将其组织成单向链表,并返回链表头指针。链表节点结构定义如下:
struct stud_node {
int num; /*学号*/
char name[20]; /*姓名*/
int score; /*成绩*/
struct stud_node *next; /*指向下个结点的指针*/
};
输入为若干个学生的信息(学号、姓名、成绩),当输入学号为0时结束。
函数deletelist
从以head
为头指针的链表中删除成绩低于min_score
的学生,并返回结果链表的头指针。
裁判测试程序样例:
#include
#include
struct stud_node {
int num;
char name[20];
int score;
struct stud_node *next;
};
struct stud_node *createlist();
struct stud_node *deletelist( struct stud_node *head, int min_score );
int main()
{
int min_score;
struct stud_node *p, *head = NULL;
head = createlist();
scanf("%d", &min_score);
head = deletelist(head, min_score);
for ( p = head; p != NULL; p = p->next )
printf("%d %s %d\n", p->num, p->name, p->score);
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
1 zhang 78
2 wang 80
3 li 75
4 zhao 85
0
80
输出样例:
2 wang 80
4 zhao 85
struct stud_node *createlist() {
struct stud_node *head = NULL, *rear = head, *p;
int num;
scanf("%d", &num);
while (num != 0) {
p = (struct stud_node *) malloc(sizeof(struct stud_node));
p->num = num;
scanf("%s %d", p->name, &p->score);
if (head == NULL) head = p;
else rear->next = p;
rear = p;
p->next = NULL;
scanf("%d", &num);
}
return head;
}
struct stud_node *deletelist(struct stud_node *head, int min_score) {
struct stud_node *p = NULL, *q = NULL, *x = NULL, *y = NULL;
if (head == NULL) return NULL;
p = head;
while (p->score < min_score) {
p = p->next;
if (p == NULL) return p;
}
head = p;
q = p->next;
if (q == NULL) return p;
while (q != NULL) {
if (q->score < min_score) {
x = q;
q = q->next;
free(x);
p->next = q;
} else {
p = q;
q = p->next;
}
}
return head;
}
本题要求实现一个函数,按输入数据的逆序建立一个链表。
函数接口定义:
struct ListNode *createlist();
函数createlist
利用scanf
从输入中获取一系列正整数,当读到−1时表示输入结束。按输入数据的逆序建立一个链表,并返回链表头指针。链表节点结构定义如下:
struct ListNode {
int data;
struct ListNode *next;
};
裁判测试程序样例:
#include
#include
struct ListNode {
int data;
struct ListNode *next;
};
struct ListNode *createlist();
int main()
{
struct ListNode *p, *head = NULL;
head = createlist();
for ( p = head; p != NULL; p = p->next )
printf("%d ", p->data);
printf("\n");
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
1 2 3 4 5 6 7 -1
输出样例:
7 6 5 4 3 2 1
struct ListNode *createlist() {
struct ListNode *head = NULL, *p, *x;
int num;
scanf("%d", &num);
if (num == -1) return NULL;
while (num != -1) {
p = (struct ListNode *) malloc(sizeof(struct ListNode));
p->data = num;
p->next = NULL;
if (head == NULL) {
head = p;
} else {
p->next = head;
head = p;
}
scanf("%d", &num);
}
return head;
}
本题要求实现两个函数,分别将读入的数据存储为单链表、将链表中偶数值的结点删除。链表结点定义如下:
struct ListNode {
int data;
struct ListNode *next;
};
函数接口定义:
struct ListNode *createlist();
struct ListNode *deleteeven( struct ListNode *head );
函数createlist
从标准输入读入一系列正整数,按照读入顺序建立单链表。当读到−1时表示输入结束,函数应返回指向单链表头结点的指针。
函数deleteeven
将单链表head
中偶数值的结点删除,返回结果链表的头指针。
裁判测试程序样例:
#include
#include
struct ListNode {
int data;
struct ListNode *next;
};
struct ListNode *createlist();
struct ListNode *deleteeven( struct ListNode *head );
void printlist( struct ListNode *head )
{
struct ListNode *p = head;
while (p) {
printf("%d ", p->data);
p = p->next;
}
printf("\n");
}
int main()
{
struct ListNode *head;
head = createlist();
head = deleteeven(head);
printlist(head);
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
1 2 2 3 4 5 6 7 -1
输出样例:
1 3 5 7
struct ListNode *createlist() {
struct ListNode *head = NULL, *rear = head, *p;
int num;
scanf("%d", &num);
if (num == -1) return NULL;
while (num != -1) {
p = (struct ListNode *) malloc(sizeof(struct ListNode));
p->data = num;
p->next = NULL;
if (head == NULL) head = p;
else rear->next = p;
rear = p;
scanf("%d", &num);
}
return head;
}
struct ListNode *deleteeven(struct ListNode *head) {
struct ListNode *p, *q, *x;
if (head == NULL) return NULL;
while (head->data % 2 == 0) {
head = head->next;
if (head == NULL) return NULL;
}
p = head;
q = p->next;
while (q != NULL) {
if ((q->data) % 2 == 0) {
x = q;
q = q->next;
free(x);
p->next = q;
} else {
p = q;
q = p->next;
}
}
return head;
}
本题要求实现一个合并两个有序链表的简单函数。链表结点定义如下:
struct ListNode {
int data;
struct ListNode *next;
};
函数接口定义:
struct ListNode *mergelists(struct ListNode *list1, struct ListNode *list2);
其中list1
和list2
是用户传入的两个按data
升序链接的链表的头指针;函数mergelists
将两个链表合并成一个按data
升序链接的链表,并返回结果链表的头指针。
裁判测试程序样例:
#include
#include
struct ListNode {
int data;
struct ListNode *next;
};
struct ListNode *createlist(); /*裁判实现,细节不表*/
struct ListNode *mergelists(struct ListNode *list1, struct ListNode *list2);
void printlist( struct ListNode *head )
{
struct ListNode *p = head;
while (p) {
printf("%d ", p->data);
p = p->next;
}
printf("\n");
}
int main()
{
struct ListNode *list1, *list2;
list1 = createlist();
list2 = createlist();
list1 = mergelists(list1, list2);
printlist(list1);
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
1 3 5 7 -1
2 4 6 -1
输出样例:
1 2 3 4 5 6 7
struct ListNode *mergelists(struct ListNode *list1, struct ListNode *list2) {
struct ListNode *fuzhu, *p, *head;
int i = 0, j, cnt = 0, a[1000] = {0}, e;
if (list1 == NULL) return list2;
head = list1;
fuzhu = list1;
while (fuzhu != NULL) {
if (fuzhu->next == NULL) break;
fuzhu = fuzhu->next;
}
fuzhu->next = list2;
p = head;
while (p != NULL) {
a[i++] = p->data;
cnt++;
p = p->next;
}
for (i = 0; i < cnt; i++) {
for (j = 1; j < cnt - i; j++) {
if (a[j - 1] >= a[j]) {
e = a[j];
a[j] = a[j - 1];
a[j - 1] = e;
}
}
}
i = 0;
struct ListNode *head1 = NULL, *rear = head1;
while (i < cnt) {
p = (struct ListNode *) malloc(sizeof(struct ListNode));
p->data = a[i++];
if (head1 == NULL) head1 = p;
else rear->next = p;
rear = p;
p->next = NULL;
}
return head1;
}
本题要求实现两个函数,分别将读入的数据存储为单链表、将链表中奇数值的结点重新组成一个新的链表。链表结点定义如下:
struct ListNode {
int data;
ListNode *next;
};
函数接口定义:
struct ListNode *readlist();
struct ListNode *getodd( struct ListNode **L );
函数readlist
从标准输入读入一系列正整数,按照读入顺序建立单链表。当读到−1时表示输入结束,函数应返回指向单链表头结点的指针。
函数getodd将单链表L中奇数值的结点分离出来,重新组成一个新的链表。返回指向新链表头结点的指针,同时将L中存储的地址改为删除了奇数值结点后的链表的头结点地址(所以要传入L的指针)。
裁判测试程序样例:
#include
#include
struct ListNode {
int data;
struct ListNode *next;
};
struct ListNode *readlist();
struct ListNode *getodd( struct ListNode **L );
void printlist( struct ListNode *L )
{
struct ListNode *p = L;
while (p) {
printf("%d ", p->data);
p = p->next;
}
printf("\n");
}
int main()
{
struct ListNode *L, *Odd;
L = readlist();
Odd = getodd(&L);
printlist(Odd);
printlist(L);
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
1 2 2 3 4 5 6 7 -1
输出样例:
1 3 5 7
2 2 4 6
struct ListNode* readlist() {
struct ListNode* head=NULL, * rear = head, * p;
int num;
scanf("%d", &num);
while (num != -1) {
p = (struct ListNode*)malloc(sizeof(struct ListNode));
p->data = num;
if (head == NULL) head = p;
else rear->next = p;
rear = p;
rear->next = NULL;
scanf("%d", &num);
}
return head;
}
struct ListNode* getodd(struct ListNode** L){
struct ListNode* p, * str1, * str2, * head = NULL, * rear = head,*fuzhu,*q;
str1 = *L;
if (str1 == NULL) return NULL;
while (str1->data%2!=0) {
p = (struct ListNode *) malloc(sizeof(struct ListNode));
p->data = str1->data;
if (head == NULL) head = p;
else rear->next = p;
rear = p;
rear->next = NULL;
str1 = str1->next;
if (str1 == NULL) {
*L = NULL;
return head;
}
}
q = str1;
str2 = str1->next;
if (str2 == NULL) {
*L = str1;
}
while (str2 != NULL) {
if (str2->data % 2 != 0) {
p = (struct ListNode *) malloc(sizeof(struct ListNode));
p->data = str2->data;
if (head == NULL) head = p;
else rear->next = p;
rear = p;
rear->next = NULL;
fuzhu = str2;
str2 = str2->next;
str1->next = str2;
free(fuzhu);
} else {
str1 = str2;
str2 = str2->next;
}
}
*L = q;
return head;
}
本题要求实现一个函数,统计学生学号链表中专业为计算机的学生人数。链表结点定义如下:
struct ListNode {
char code[8];
struct ListNode *next;
};
这里学生的学号共7位数字,其中第2、3位是专业编号。计算机专业的编号为02。
函数接口定义:
int countcs( struct ListNode *head );
其中head
是用户传入的学生学号链表的头指针;函数countcs
统计并返回head
链表中专业为计算机的学生人数。
裁判测试程序样例:
#include
#include
#include
struct ListNode {
char code[8];
struct ListNode *next;
};
struct ListNode *createlist(); /*裁判实现,细节不表*/
int countcs( struct ListNode *head );
int main()
{
struct ListNode *head;
head = createlist();
printf("%d\n", countcs(head));
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
1021202
2022310
8102134
1030912
3110203
4021205
#
输出样例:
3
int countcs(struct ListNode *head) {
int cnt = 0;
struct ListNode *p = head;
while (p != NULL) {
if (p->code[1] == '0' && p->code[2] == '2') {
cnt++;
}
p = p->next;
}
return cnt;
}
本题要求实现两个函数,分别将读入的数据存储为单链表、将链表中所有存储了某给定值的结点删除。链表结点定义如下:
struct ListNode {
int data;
ListNode *next;
};
函数接口定义:
struct ListNode *readlist();
struct ListNode *deletem( struct ListNode *L, int m );
函数readlist
从标准输入读入一系列正整数,按照读入顺序建立单链表。当读到−1时表示输入结束,函数应返回指向单链表头结点的指针。
函数deletem
将单链表L
中所有存储了m
的结点删除。返回指向结果链表头结点的指针。
裁判测试程序样例:
#include
#include
struct ListNode {
int data;
struct ListNode *next;
};
struct ListNode *readlist();
struct ListNode *deletem( struct ListNode *L, int m );
void printlist( struct ListNode *L )
{
struct ListNode *p = L;
while (p) {
printf("%d ", p->data);
p = p->next;
}
printf("\n");
}
int main()
{
int m;
struct ListNode *L = readlist();
scanf("%d", &m);
L = deletem(L, m);
printlist(L);
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
10 11 10 12 10 -1
10
输出样例:
11 12
struct ListNode *readlist() {
struct ListNode *head = NULL, *rear = head, *p;
int num;
scanf("%d", &num);
while (num != -1) {
p = (struct ListNode *) malloc(sizeof(struct ListNode));
p->data = num;
if (head == NULL) head = p;
else rear->next = p;
rear = p;
rear->next = NULL;
scanf("%d", &num);
}
return head;
}
struct ListNode *deletem(struct ListNode *L, int m) {
struct ListNode *str1, *str2, *p, *fuzhu;
if (L == NULL) return L;
str1 = L;
while (str1->data == m) {
str1 = str1->next;
if (str1->next == NULL) return NULL;
}
p = str1;
if (str1 == NULL) return str1;
str2 = str1->next;
if (str2 == NULL) return p;
while (str2 != NULL) {
if (str2->data == m) {
fuzhu = str2;
str2 = str2->next;
free(fuzhu);
str1->next = str2;
} else {
str1 = str2;
str2 = str2->next;
}
}
return p;
}
本题要求实现一个函数,将给定单向链表逆置,即表头置为表尾,表尾置为表头。链表结点定义如下:
struct ListNode {
int data;
struct ListNode *next;
};
函数接口定义:
struct ListNode *reverse( struct ListNode *head );
其中head
是用户传入的链表的头指针;函数reverse
将链表head
逆置,并返回结果链表的头指针。
裁判测试程序样例:
#include
#include
struct ListNode {
int data;
struct ListNode *next;
};
struct ListNode *createlist(); /*裁判实现,细节不表*/
struct ListNode *reverse( struct ListNode *head );
void printlist( struct ListNode *head )
{
struct ListNode *p = head;
while (p) {
printf("%d ", p->data);
p = p->next;
}
printf("\n");
}
int main()
{
struct ListNode *head;
head = createlist();
head = reverse(head);
printlist(head);
return 0;
}
/* 你的代码将被嵌在这里 */
输入样例:
1 2 3 4 5 6 -1
输出样例:
6 5 4 3 2 1
struct ListNode *reverse(struct ListNode *head) {
struct ListNode *p, *head1 = NULL, *rear = head1;
int i = 0, cnt = 0, a[1000] = {0};
if (head == NULL) return NULL;
while (head != NULL) {
a[i++] = head->data;
cnt++;
head = head->next;
}
for (i = cnt - 1; i >= 0; i--) {
p = (struct ListNode *) malloc(sizeof(struct ListNode));
p->data = a[i];
if (head1 == NULL) head1 = p;
else rear->next = p;
rear = p;
rear->next = NULL;
}
return head1;
}