#include "stdafx.h"
#include "iostream"
#include "string"
#define OK 1
#define ERROR 0
using namespace std;
typedef int status;
typedef struct {
int examnum;
string name;
string gender;
int age;
int Chinese;
int Maths;
int English;
float everage;
int sum;
}ElemType;
typedef struct LNode {
ElemType data;
struct LNode *next;
}LNode, *LinkList;
LinkList L;
void CreateList(LinkList &L, int n);
status ListInsert(LinkList &L, int i, ElemType e);
status ListDelete(LinkList &L, int i, ElemType &e);
int LocateElem(LinkList L, ElemType e);
status GetElem(LinkList L, int i, ElemType &e);
int ListLength(LinkList L);
void ListTraverse(LinkList L);
void UpdateByNo(LinkList &L, int examnum);
void Operation();
void Flunk(LinkList L, int i);
void Ranking(LinkList &L);
//创建考生信息的线性表（带头结点的单链表）
void CreateList(LinkList &L, int n) {
L = new LNode; //新结点
L->next = NULL; //头结点 空
ElemType e;
LinkList s, p = L;
cout << endl << "\t初始化链表完成并生成了头结点！" << endl;
for (int i = 0; i < n; i++) {
s = new LNode;
cout << "\t请输入第" << i + 1 << "个考生的信息：" << endl;
cout << "\t 准考证号："; cin >> s->data.examnum;
cout << "\t 考生姓名："; cin >> s->data.name;
cout << "\t 考生性别："; cin >> s->data.gender;
cout << "\t 考生年龄："; cin >> s->data.age;
cout << "\t 语文成绩："; cin >> s->data.Chinese;
cout << "\t 数学成绩："; cin >> s->data.Maths;
cout << "\t 英语成绩："; cin >> s->data.English;
s->data.sum = s->data.Chinese + s->data.English + s->data.Maths;
s->data.everage = s->data.sum / 3.0;
p->next = s;
p = s;
}
p->next = NULL;
}
//在线性表的某个位置上插入考生信息
status ListInsert(LinkList &L, int i, ElemType e) {
LinkList p = new LNode;
p = L;//p指向头结点
int j = 0;
while (p&&j < i - 1)
{
p = p->next;
++j;
}
if (!p&&j > i - 1)
{
cout << endl << "\t插入失败" << endl << endl;
return ERROR;
}
LNode *s;
s = new LNode;
s->data = e;
s->next = p->next;
p->next = s;
cout << endl << "\t插入成功" << endl << endl;
return OK;
}
//删除线性表中第i个考生的信息
status ListDelete(LinkList &L, int i, ElemType &e) {
LinkList p = new LNode;
LinkList q = new LNode;
p = L;
int j = 0;
while (p->next&&j < i - 1) {
p = p->next; j++;
}
if (!(p->next) || j > i - 1) {
return ERROR;
}
q = p->next;
p->next = q->next;
e = q->data;
delete q;
return OK;
}
//根据考号查询某考生的位序
int LocateElem(LinkList L, ElemType e) {//在带头结点的单链表L中查找元素e
int i = 1, length = 0;
LinkList p = new LNode;
p = L->next;
while ((i <= ListLength(L)) && (e.examnum != p->data.examnum))
{
i++;
p = p->next;
}
if (i <= ListLength(L) && (e.examnum == p->data.examnum))
return i;
return 0;
}
//根据位序查询线性表中的考生信息
status GetElem(LinkList L, int i, ElemType &e) {
LinkList p = new LNode;
p = L->next;
int j = 1;
while (p&&j < i) {
p = p->next;
j++;
}
if (!p || j > i)
return ERROR;
e = p->data;
return OK;
}
//求线性表的长度
int ListLength(LinkList L) {
int length = 0;
LinkList p = new LNode;
p = L->next;
while (p) {
length++;
p = p->next;
}
return length;
}
//输出线性表中的考生信息
void ListTraverse(LinkList L) {
int i = 1;
LNode *p = L->next;
cout << endl << "\t考生信息如下：" << endl;
while (p)
{
cout << "\t第" << i << "个考生的信息为：" << endl;
cout << "\t 准考证号：" << p->data.examnum << endl;
cout << "\t 考生姓名：" << p->data.name << endl;
cout << "\t 考生性别：" << p->data.gender << endl;
cout << "\t 考生年龄：" << p->data.age << endl;
cout << "\t 语文成绩：" << p->data.Chinese << endl;
cout << "\t 数学成绩：" << p->data.Maths << endl;
cout << "\t 英语成绩：" << p->data.English << endl;
cout << "\t 平均成绩：" << p->data.everage << endl;
cout << "\t 总成绩：" << p->data.sum << endl << endl;
p = p->next;
i++;
}
cout << "\t输出完毕！" << endl << endl;
}
//根据考号修改线性表中的考生信息
void UpdateByNo(LinkList &L, int examnum) {
LinkList p = new LNode;
p = L->next;
int i = 1;
while (p&&p->data.examnum != examnum) {
p = p->next;
i++;
}
if (i <= ListLength(L) && (examnum == p->data.examnum)) {
cout << "\t请重新输入该考生的信息：" << endl << endl;
cout << "\t 准考证号："; cin >> p->data.examnum;
cout << "\t 考生姓名："; cin >> p->data.name;
cout << "\t 考生性别："; cin >> p->data.gender;
cout << "\t 考生年龄："; cin >> p->data.age;
cout << "\t 语文成绩："; cin >> p->data.Chinese;
cout << "\t 数学成绩："; cin >> p->data.Maths;
cout << "\t 英语成绩："; cin >> p->data.English;
p->data.sum = p->data.Chinese + p->data.Maths + p->data.English;
p->data.everage = p->data.sum / 3.0;
cout << endl << "\t修改成功！" << endl << endl;
}
else cout << endl << "\t学号有误！" << endl << endl;
}
void Flunk(LinkList L, int i) {
LinkList p = new LNode;
p = L->next;
int flunkNum = 0;
switch (i)
{
case 1:
cout << "\t 语文不及格名单如下：" << endl << endl;
while (p) {
if (p->data.Chinese < 60) {
cout << "\t\t姓名：" << p->data.name;
cout << " 语文：" << p->data.Chinese << endl << endl;
flunkNum++;
}
p = p->next;
}
if (!flunkNum)
cout << "\t 语文成绩全部及格！" << endl << endl;
break;
case 2:
cout << "\t 数学不及格名单如下：" << endl << endl;
while (p) {
if (p->data.Maths < 60) {
cout << "\t\t姓名：" << p->data.name;
cout << " 数学：" << p->data.Maths << endl << endl;
flunkNum++;
}
p = p->next;
}
if (!flunkNum)
cout << "\t 数学成绩全部及格！" << endl << endl;
break;
case 3:
cout << "\t 英语不及格名单如下：" << endl << endl;
while (p) {
if (p->data.English < 60) {
cout << "\t\t姓名：" << p->data.name;
cout << " 英语：" << p->data.English << endl << endl;
flunkNum++;
}
p = p->next;
}
if (!flunkNum)
cout << "\t 英语成绩全部及格！" << endl << endl;
break;
default:
cout << endl << "\t 输入有误！" << endl << endl;
break;
}
}
void Ranking(LinkList &L) {
LinkList p = new LNode, q = new LNode;
ElemType e;
p = L->next;
for (int i = 0; i < ListLength(L); i++) {
if (p->next)
q = p->next;
for (int j = i + 1; j < ListLength(L); j++) {
if (p->data.sum < q->data.sum) {
e = p->data;
p->data = q->data;
q->data = e;
}
if (q)
q = q->next;
}
if (p)
p = p->next;
}
}
void Operation() {//用户可以循环选择操作类型
int j = -1;
while (j) {
cout << "\t 1为插入\t\t 2为删除\t\t 3为查找" << endl;
cout << "\t 4为修改\t\t 5为统计\t\t 6列出成绩单" << endl;
cout << "\t 7查询不及格成绩\t 8根据总分排名\t\t 0为退出" << endl;
cout << endl << " 请选择您要进行的操作：";
cin >> j;
cout << endl;
switch (j) {
case 1: { //插入
cout << " 请输入你要插入的考生的位置：";
int i; cin >> i;
ElemType e;
cout << " 请输入考生信息：" << endl << endl;
cout << "\t 准考证号："; cin >> e.examnum;
cout << "\t 考生姓名："; cin >> e.name;
cout << "\t 考生性别："; cin >> e.gender;
cout << "\t 考生年龄："; cin >> e.age;
cout << "\t 语文成绩："; cin >> e.Chinese;
cout << "\t 数学成绩："; cin >> e.Maths;
cout << "\t 英语成绩："; cin >> e.English;
e.sum = e.Chinese + e.Maths + e.English;
e.everage = e.sum / 3.0;
ListInsert(L, i, e);
break;
}
case 2: {//删除
cout << " 请输入你要删除的考生的考号：";
ElemType e; cin >> e.examnum;
int i = LocateElem(L, e);
if (i)
if (ListDelete(L, i, e))
cout << endl << " 删除成功！" << endl << endl;
else
cout << endl << " 删除失败！" << endl << endl;
else cout << endl << " 不存在此考生！" << endl << endl;
break;
}
case 3: {//查找
cout << " 请输入你要查询的考生的序号：";
int i; ElemType e; cin >> i;
if (GetElem(L, i, e)) {
cout << "\t第" << i << "个考生的信息为：" << endl;
cout << "\t 准考证号：" << e.examnum << endl;
cout << "\t 考生姓名：" << e.name << endl;
cout << "\t 考生性别：" << e.gender << endl;
cout << "\t 考生年龄：" << e.age << endl;
cout << "\t 语文成绩：" << e.Chinese << endl;
cout << "\t 数学成绩：" << e.Maths << endl;
cout << "\t 英语成绩：" << e.English << endl << endl;
}
else
{
cout << "\t 序号有误！" << endl << endl;
}
break;
}
case 4: {//修改
cout << " 请输入你要修改信息的考生的考号：";
int examnum;
cin >> examnum;
UpdateByNo(L, examnum);
break;
}
case 5: {//统计
cout << "\t 报考人数为：" << ListLength(L) << endl << endl;
ListTraverse(L);
break;
}
case 6:ListTraverse(L); break;//输出
case 7://列出不及格成绩
cout << "\t 1语文\t 2数学\t 3英语" << endl << endl;
cout << "\t请输入您要查询不及格科目的序号：";
cin >> j;
Flunk(L, j);
break;
case 8://根据总分排名
Ranking(L);
cout << endl << " 排名完成！成绩单如下：" << endl << endl;
ListTraverse(L);
break;
case 0: return;
default:
cout << endl << "该操作不存在，请输入正确操作！" << endl << endl;
break;
}
}
}
//主函数，调用各个函数实现相应功能
void main() {
int n;
cout << "\t\t\t\t*\t\t\t\t\t*";
cout << "\t\t\t\t*****************************************" << endl << endl;
cout << " 正在为您准备初始化链表，请输入您要输入的学生个数：";
cin >> n;
CreateList(L, n);//创建初始链表
cout << endl << " 初始化成功，" << n << "个考生的信息已存储。" << endl << endl;
Operation();
}
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