#include <iostream>
#include <stdio.h>
#include <string>
#include <cstring>
#include<math.h>
#include<io.h>
#include <stdlib.h>
using namespace std;
//定义学生节点
typedef struct studentNode{
string number;
string name;
int math;
int english;
int chinese;
struct studentNode *next;
}*student;
int countOfStudent;
FILE * fp;
void ShowAllStudentInfo(student& studentLink);
//输入学生信息
void InputStudentInfo(student& studentLink){
cout << "************欢迎进入学生信息创建菜单*************" << endl;
cout << "1.重新创建" << endl;
cout << "2.引用已有数据" << endl;
int choice = 0;
int choice1 = 0;
studentLink->next = nullptr;
cin >> choice;
switch (choice){
case 1:{
cout << "请依次输入学号，姓名，数学成绩，英语成绩，语文成绩:" << endl;
countOfStudent = 0;
while (1){
student stu = new studentNode;
countOfStudent = countOfStudent + 1;
cin >> stu->number >> stu->name >> stu->math >> stu->english >> stu->chinese;
cout << stu->number << stu->name << stu->math << stu->english << stu->chinese;
//头插法
stu->next = studentLink->next;
studentLink->next = stu;
cout << "1.继续输入 2.已完成" << endl;
cin >> choice1;
if (choice1 == 2)
{
//输入完成后将学生信息写入文件
fp = fopen("output\\studentFile.txt", "w");
fprintf(fp, "%d\n", countOfStudent);
student p = studentLink->next;
while (p){
fprintf(fp, "%s %s %d %d %d \n", p->number.c_str(), p->name.c_str(), p->math, p->english, p->chinese);
cout << p->number << p->name << p->math << p->english << p->chinese;
p = p->next;
}
fclose(fp);
break;
}
else{
cout << "请依次输入学号，姓名，数学成绩，英语成绩，语文成绩:" << endl;
}
}
break;
}
case 2:
//到指定文件夹读取数据
int exists = 0;
if (!access("output\\studentFile.txt", 0))
exists = 1;
char a[20];
char b[30];
if (exists)
{
fp = fopen("output\\studentFile.txt", "rt");
fscanf(fp, "%d", &countOfStudent);
for (int i = 0; i<countOfStudent; i++)
{
student stu = new studentNode;
fscanf(fp, "%s %s %d %d %d\n", b, a, &stu->math, &stu->english, &stu->chinese);
stu->number = b;
stu->name = a;
//头插法
stu->next = studentLink->next;
studentLink->next = stu;
}
cout << "已加载完成！" << "已加载" << countOfStudent << "条数据！" << endl;
//cout<<stu1.name<<stu1.number<<stu1.chinese<<stu1.math<<stu1.english<<endl;
}
else{
cout << "暂无本地数据，请手动创建！" << endl;
}
fclose(fp);
break;
}
}
//显示所有学生信息
void ShowAllStudentInfo(student& studentLink){
cout << "************欢迎进入学生信息浏览菜单*************" << endl;
student p = studentLink->next;
cout << "学号： " << "姓名： " << "数学： " << "英语： " << "语文： " << endl;
while (p){
cout << p->number << " " << p->name << " " << p->math << " " << p->english << " " << p->chinese << endl;
p = p->next;
}
}
//数据的排序，并显示
void SortAllStudentInfo(student& studentLink){
cout << "************欢迎进入学生信息顺序显示菜单*************" << endl;
int choice = 0;
cout << "1 按学号升序显示 2 按学号降序显示 " << endl;
cout << "请输入您的选择：" << endl;
cin >> choice;
switch (choice){
case 1:{
student p;//循环指示变量，用于指向无序表的当前待插入元素
student q;//q和r用于对已有有序序列进行循环遍历
student r;
student u;//临时变量，用于控制循环
p = studentLink->next;
studentLink->next = nullptr;
while (p){
//每次循环开始前将指针指向最开始的地方
r = studentLink;
q = studentLink->next;
while ((q != nullptr) && q->number < p->number){
r = q;
q = q->next;
}
//保存下一个需插入的点
u = p->next;
//保存好了之后进行插入
p->next = r->next;
r->next = p;
//插入完成之后，将p指回未排序序列
p = u;
}
{
}
{
fp = fopen("output\\studentAscend.txt", "w");
cout << "************学生信息升序浏览*************" << endl;
student p = studentLink->next;
cout << "学号： " << "姓名： " << "数学： " << "英语： " << "语文： " << endl;
while (p){
cout << p->number << " " << p->name << " " << p->math << " " << p->english << " " << p->chinese << endl;
fprintf(fp, "%s %s %d %d %d \n", p->number.c_str(), p->name.c_str(), p->math, p->english, p->chinese);
p = p->next;
}
}
fclose(fp);
break;
}
case 2:{
student p, q, r, u;
p = studentLink->next;
studentLink->next = nullptr;
while (p){
r = studentLink;
q = studentLink->next;
while ((q != nullptr) && q->number>p->number){
r = q;
q = q->next;
}
u = p->next;
p->next = r->next;
r->next = p;
p = u;
}
{
fp = fopen("output\\studentDescend.txt", "w");
cout << "************学生信息降序浏览*************" << endl;
student p = studentLink->next;
cout << "学号： " << "姓名： " << "数学： " << "英语： " << "语文： " << endl;
while (p){
cout << p->number << " " << p->name << " " << p->math << " " << p->english << " " << p->chinese << endl;
fprintf(fp, "%s %s %d %d %d \n", p->number.c_str(), p->name.c_str(), p->math, p->english, p->chinese);
p = p->next;
}
}
fclose(fp);
break;
}
}
}
//学生信息查询
void SearchStudentInfo(student& studentLink){
cout << "************欢迎进入学生信息查询菜单*************" << endl;
while (1)
{
cout << "1.按照学号查询。 2.按照姓名查询" << endl;
int choice = 0;
int choice1 = 0;
cin >> choice;
switch (choice){
case 1:
{
student p = studentLink->next;
cout << "1.按照学号精确查询。 2.按照学号模糊查询" << endl;
cin >> choice1;
switch (choice1){
case 1:
{
cout << "请输入精确学号：" << endl;
string num;
cin >> num;
bool flag = false;
while (p){
if (p->number == num)
{
flag = true;
cout << "学号： " << "姓名： " << "数学： " << "英语： " << "语文： " << endl;
cout << p->number << " " << p->name << " " << p->math << " " << p->english << " " << p->chinese << endl;
break;
}
p = p->next;
}
if (!flag)
{
cout << "当前学号不存在" << endl;
}
break;
}
case 2:
{
cout << "请输入前缀学号：" << endl;
string num;
bool flag = false;
cin >> num;
while (p){
if (p->number.find(num, 0) == 0)
{
if (!flag)
{
cout << "学号： " << "姓名： " << "数学： " << "英语： " << "语文： " << endl;
};
cout << p->number << " " << p->name << " " << p->math << " " << p->english << " " << p->chinese << endl;
flag = true;
}
p = p->next;
}
if (!flag)
{
cout << "当前学号不存在" << endl;
}
break;
}
}
break; }
case 2:
{
student p = studentLink->next;
cout << "1.按照姓名精确查询。 2.按照姓氏模糊查询" << endl;
cin >> choice1;
switch (choice1){
case 1:
{
cout << "请输入精确姓名：" << endl;
string name;
cin >> name;
bool flag = false;
while (p){
if (p->name == name)
{
cout << "学号： " << "姓名： " << "数学： " << "英语： " << "语文： " << endl;
cout << p->number << " " << p->name << " " << p->math << " " << p->english << " " << p->chinese << endl;
flag = true;
break;
}
p = p->next;
}
if (!flag)
{
cout << "当前姓名不存在" << endl;
}
break;
}
case 2:
{
cout << "请输入前缀姓氏：" << endl;
string name;
bool flag = false;
cin >> name;
while (p){
if (p->name.find(name, 0) == 0)
{
if (!flag)
{
cout << "学号： " << "姓名： " << "数学： " << "英语： " << "语文： " << endl;
};
cout << p->number << " " << p->name << " " << p->math << " " << p->english << " " << p->chinese << endl;
flag = true;
}
p = p->next;
}
if (!flag)
{
cout << "当前姓氏不存在" << endl;
}
break;
}
}
break;
}
}
int choice3 = 0;
cout << "1.继续查询。 2.查询完成" << endl;
cin >> choice3;
if (choice3 == 2)
{
break;
}
}
}
//对学生信息进行修改
void ModifyStudentInfo(student& studentLink){
cout << "************欢迎进入学生信息修改菜单*************" << endl;
fp = fopen("output\\studentFile.txt", "rt");
fscanf(fp, "%d", &countOfStudent);
fclose(fp);
while (1){
cout << "1.添加 2.删除 3.修改" << endl;
int choice = 0;
cout << "请输入您想要的操作：" << endl;
cin >> choice;
switch (choice){
case 1:
{
cout << "请依次输入学号，姓名，数学成绩，英语成绩，语文成绩:" << endl;
while (1){
student stu = new studentNode;
countOfStudent = countOfStudent + 1;
cin >> stu->number >> stu->name >> stu->math >> stu->english >> stu->chinese;
cout << stu->number << stu->name << stu->math << stu->english << stu->chinese;
//头插法
stu->next = studentLink->next;
studentLink->next = stu;
cout << "1.继续输入 2.已完成" << endl;
int choice1 = 0;
cout << "请输入选择：" << endl;
cin >> choice1;
if (choice1 == 2)
{
break;
}
}
break;
}
case 2:
{
cout << "请输入学生学号" << endl;
string number1;
cin >> number1;
bool flag = false;
student p = studentLink;
student p1 = p->next;
while (p){
if (p1)
{
if (p1->number == number1)
{
cout << "find" << endl;
student p2 = p1;
p->next = p2->next;
free(p2);
flag = true;
countOfStudent--;
}
}
p = p->next;
if (p)
{
p1 = p->next;
}
}
if (!flag)
{
cout << "无此学生！" << endl;
}
break;
}
case 3:
{
cout << "请输入需修改学生的学号：" << endl;
string number;
cin >> number;
bool flag = false;
student p = studentLink->next;
while (p){
if (p->number == number)
{
flag = true;
cout << "1 修改学号 2 修改姓名 3 修改数学成绩 4 修改英语成绩 5 修改英语成绩" << endl;
int cho = 0;
cin >> cho;
switch (cho){
case 1:{
cout << "请输入新的学号：" << endl;
string num;
cin >> num;
p->number = num;
break;
}
case 2:{
cout << "请输入新的姓名：" << endl;
string name;
cin >> name;
p->name = name;
break;
}
case 3:{
cout << "请输入新的数学成绩：" << endl;
int num;
cin >> num;
p->math = num;
break;
}
case 4:{
cout << "请输入新的英语成绩：" << endl;
int num;
cin >> num;
p->english = num;
break;
}
case 5:{
cout << "请输入新的语文成绩：" << endl;
int num;
cin >> num;
p->chinese = num;
break;
}
}
}
p = p->next;
}
if (!flag)
{
cout << "该学号不存在" << endl;
}
break;
}
}
cout << "1 继续修改 2 修改完成" << endl;
int choice7 = 0;
cin >> choice7;
if (choice7 == 2)
{
student p = studentLink->next;
cout << "sssssss" << endl;
//输入完成后将学生信息写入文件
fp = fopen("output\\studentFile.txt", "w");
fprintf(fp, "%d\n", countOfStudent);
while (p){
fprintf(fp, "%s %s %d %d %d \n", p->number.c_str(), p->name.c_str(), p->math, p->english, p->chinese);
p = p->next;
}
fclose(fp);
break;
}
}
}
//数据统计功能
void StatisticStudentInfo(student& studentLink){
cout << "1 学生平均分及总分 2 每门课程平均分机最高分最低分" << endl;
int choice = 0;
cout << "请输入您的选择：" << endl;
cin >> choice;
switch (choice){
case 1:
{
//计算每个学生的平均分和总分
fp = fopen("output\\studentAverageScoreAndTotal.txt", "wb");
student p = studentLink->next;
int avg = 0;
int total = 0;
cout << "学号： " << "姓名： " << "平均分： " << "总分： " << endl;
while (p){
avg = (p->math + p->english + p->chinese) / 3;
total = p->math + p->english + p->chinese;
fprintf(fp, "%s %s %ld %ld\n", p->number.c_str(), p->name.c_str(), avg, total);
cout << p->number << " " << p->name << " " << avg << " " << total << endl;
p = p->next;
}
fclose(fp);
break;
}
case 2:
{
int mathMax = 0; int mathMin = 65535; int mathAvg = 0;
int englishMax = 0; int englishMin = 65535; int englishAvg = 0;
int chineseMax = 0; int chinesMin = 65535; int chineseAvg = 0;
int countOfM = 0;
student p = studentLink->next;
while (p){
//遍历数学成绩
if (p->math>mathMax){
mathMax = p->math;
}
if (p->math<mathMin){
mathMin = p->math;
}
mathAvg += p->math;
if (p->english>englishMax)
{
englishMax = p->english;
}
if (p->english<englishMin)
{
englishMin = p->english;
}
englishAvg += p->english;
if (p->chinese >chineseMax)
{
chineseMax = p->chinese;
}
if (p->chinese<chinesMin)
{
chinesMin = p->chinese;
}
chineseAvg += p->chinese;
countOfM++;
p = p->next;
}
fp = fopen("output\\studentMath.txt", "wb");
fprintf(fp, "数学： 最高分：%d 最低分： %d 平均分： %d\n", mathMax, mathMin, mathAvg / countOfM);
cout << "数学： " << "最高分： " << mathMax << " 最低分： " << mathMin << " 平均分： " << mathAvg / countOfM << endl;
fclose(fp);
fp = fopen("output\\studentEglish.txt", "wb");
fprintf(fp, "英语： 最高分：%d 最低分： %d 平均分： %d\n", englishMax, englishMin, englishAvg / countOfM);
cout << "英语： " << "最高分： " << englishMax << " 最低分： " << englishMax << " 平均分： " << englishAvg / countOfM << endl;
fclose(fp);
fp = fopen("output\\studentChinese.txt", "wb");
fprintf(fp, "语文： 最高分：%d 最低分： %d 平均分： %d\n", chineseMax, chinesMin, chineseAvg / countOfM);
cout << "语文： " << "最高分： " << chineseMax << " 最低分： " << chinesMin << " 平均分： " << chineseAvg / countOfM << endl;
fclose(fp);
break;
}
}
}
int main(){
cout << "****************************欢迎来到学生信息管理系统***************************" << endl;
cout << "1.输入学生信息" << endl;
cout << "2.查询所有学生信息" << endl;
cout << "3.排序显示学生信息" << endl;
cout << "4.查询某一个学生具体信息" << endl;
cout << "5.插入新信息，修改信息，删除信息" << endl;
cout << "6.数据统计" << endl;
cout << "7.退出" << endl;
int choice = 0;
student studentLink = new studentNode;
//studentLink->next = nullptr;
while (1){
cout << "主菜单---请输入您的选择：";
cin >> choice;
switch (choice){
case 1:
InputStudentInfo(studentLink);
break;
case 2:
ShowAllStudentInfo(studentLink);
break;
case 3:
SortAllStudentInfo(studentLink);
break;
case 4:
SearchStudentInfo(studentLink);
break;
case 5:
ModifyStudentInfo(studentLink);
break;
case 6:
StatisticStudentInfo(studentLink);
break;
case 7:
exit(0);
break;
}
}
getchar();
return 0;
}
