basic_1.c

//
// Created by 1708cjy on 2020/11/25.
//

#include "basic_1.h"

char *studentInformation_PATH = "D:\\Learn\\CProgrammingLanguage\\programming\\CLion experiment\\StudentInformation.txt";
char *teacherInformation_PATH = "D:\\Learn\\CProgrammingLanguage\\programming\\CLion experiment\\TeacherInformation.txt";
char *courseInformation_PATH = "D:\\Learn\\CProgrammingLanguage\\programming\\CLion experiment\\CourseInformation.txt";
char *account_PATH = "D:\\Learn\\CProgrammingLanguage\\programming\\CLion experiment\\Information\\Administrator.bat";
extern Student *Head;
extern Course *CourseList;
extern Teacher *TeacherList;
extern Teacher *pNowTea;
extern Student *pNowStu;
extern Student *pPastStu;
//判断是否有内容
int weatherStuInformation(){
    FILE *fp = fopen(studentInformation_PATH,"ab");

    fseek(fp,0,SEEK_SET);
    Student text = {.ID = 0};
    fread(&text,sizeof(Student),1,fp);
    fseek(fp,0,SEEK_SET);
    fclose(fp);
    if (text.ID == 0) return -1;
    else return 0;
}

int weatherCourseInformation(){
    FILE *fp = fopen(courseInformation_PATH,"ab");

    fseek(fp,0,SEEK_SET);
    Course text = {.Course_ID = 0};
    fread(&text,sizeof(Course),1,fp);
    fseek(fp,0,SEEK_SET);
    fclose(fp);
    if (text.Course_ID == 0) return -2;
    else return 0;
}

int weatherTeacherInformation(){
    FILE *fp = fopen(teacherInformation_PATH,"ab");

    fseek(fp,0,SEEK_SET);
    Teacher text = {.Teacher_ID = 0};
    fread(&text,sizeof(Teacher),1,fp);
    fseek(fp,0,SEEK_SET);
    fclose(fp);
    if (text.Teacher_ID == 0) return -4;
    else return 0;
}
//判断错误情况
void MisjudgmentCase(int result){
    printf("加载中，请稍后");
    if(!result) {
        printf("数据完整，加载成功！");
        Head = readInformation();
        TeacherList = readTeacherInformation();
        CourseList = readCourseInformation();
    }
    else if (result == -1){
        printf("无学生数据！\n");
        TeacherList = readTeacherInformation();
        CourseList = readCourseInformation();
    }
    else if (result == -2){
        printf("无课程数据！\n");
        Head = readInformation();
        TeacherList = readTeacherInformation();
    }
    else if (result == -4){
        printf("无教师数据！\n");
        Head = readInformation();
        CourseList = readCourseInformation();
    }
    else if (result == -3){
        printf("无学生和课程数据！\n");
        TeacherList = readTeacherInformation();
    }
    else if (result == -5){
        printf("无学生和教师数据！\n");
        CourseList = readCourseInformation();
    }
    else if (result == -6){
        printf("无课程和教师数据！\n");
        Head = readInformation();
    }
    else if (result == -7) printf("无学生、课程和教师数据！\n");
}
//从文件中读出学生信息
Student *readInformation(){
    Student *head = NULL;
    Student *p = NULL;
    Student *q = NULL;
    FILE *fp = fopen(studentInformation_PATH,"rb");

    q = (Student *)malloc(sizeof(Student));
    if (q == NULL){
        fclose(fp);
        exit(EXIT_FAILURE);
    }
    fread(q,sizeof(Student),1,fp);
    head = q;
    do{
        p = (Student *)malloc(sizeof(Student));
        if (p == NULL){
            safeFreeStu(head);
            exit(EXIT_FAILURE);
        }
        fread(p,sizeof(Student),1,fp);
        q->pNext = p;
        q = q->pNext;
    }while (q->pNext != NULL);
    fclose(fp);

    return head;
}
//从文件中读出课程信息
Course *readCourseInformation(){
    Course *courseList = NULL;
    Course *pTemp = NULL;
    Course temp;
    int index = 1;
    FILE *fp = fopen(courseInformation_PATH,"rb");

    courseList = (Course *)malloc(sizeof(Course));
    if (courseList == NULL){
        exit(EXIT_FAILURE);
    }
    fread(courseList,sizeof(Course),1,fp);
    do{
        pTemp = (Course *)realloc(courseList,(index + 1) * sizeof(Course));
        if (pTemp == NULL){
            safeFreeCour(courseList);
            exit(EXIT_FAILURE);
        }
        courseList = pTemp;
        if (fread(&temp,sizeof(Course),1,fp) != 0){
            courseList[index] = temp;
        }else{
            courseList[index].Course_ID = 0;
            break;
        }
    }while (index++);
    fclose(fp);

    return courseList;
}
//从文件中读出教师信息
Teacher *readTeacherInformation(){
    Teacher *pTemp = NULL;
    Teacher temp;
    int index = 1;
    FILE *fp = fopen(teacherInformation_PATH,"rb");

    TeacherList = (Teacher *)malloc(sizeof(Course));
    if (TeacherList == NULL){
        exit(EXIT_FAILURE);
    }
    fread(TeacherList,sizeof(Course),1,fp);
    do{
        pTemp = (Teacher *)realloc(TeacherList,(index + 1) * sizeof(Teacher));

        if (pTemp == NULL){
            safeFreeTea(TeacherList);
            exit(EXIT_FAILURE);
        }
        TeacherList = pTemp;
        if (fread(&temp,sizeof(Course),1,fp) != 0){
            TeacherList[index] = temp;
        }else{
            TeacherList[index].Teacher_ID = 0;
            break;
        }
    }while (index++);
    fclose(fp);

    return TeacherList;
}
//读取管理员信息,无信息、账号密码不正确返回0，正确返回1
int weatherAdministrator(char *account,char *password){
    Account wayForPoint;
    Account *p = &wayForPoint;
    FILE *fp = fopen(account_PATH,"rb");

    if (fp == NULL){
        printf("账号密码错误，程序3秒后结束\n");
        sleep(3);
        return 0;
    }else{
        int count;
        do{
            count = fread(p,sizeof(Account),1,fp);
            if(strcmp(p->name,account) == 0 && strcmp(p->password,password) == 0){
                printf("当前管理员%s已登录\n",p->name);
                fclose(fp);
                return 1;
            }
        }while (count == 1);
        fclose(fp);
        printf("账号密码错误，程序3秒后结束\n");
        sleep(3);
        return 0;
    }
}

//登录信息,成功就返回账号，失败返回0；管理员返回1；
int loginIn(){
    int ID;
    char account[20] = {};
    char tryPassword[16] = {};

    printf("请输入账号或姓名：");
    fflush(stdin);
    scanf("%s",account);
    printf("请输入密码：");
    fflush(stdin);
    scanf("%s",tryPassword);
    if(isdigit(account[0]) && isdigit(account[6])){
        ID = atoi(account);
        if (ID <= 20000000 && (pNowTea = searchTeacher(ID)) != NULL){
            printf("欢迎%s老师登录",pNowTea->name);
            return ID;
        }
        else if (ID > 20000000 && ID < 21000000 && (pNowStu = searchStudent(ID)) != NULL){
            printf("欢迎%s同学登录",pNowStu->name);
            return ID;
        }
        printf("账号密码错误，程序在3秒后结束\n");
        sleep(3);
        return 0;
    }else{
        return weatherAdministrator(account,tryPassword);
    }
}

//以学生ID搜索链表内容
Student *searchStudent(int ID){
    Student *p = Head;
    Student *q = NULL;

    while(p != NULL){
        if(p->ID == ID){
            return p;
        }
        pPastStu = p;
        q = p->pNext;
        p = q;
    }
    return NULL;
}
//以教师ID搜索教师工号
Teacher *searchTeacher(int ID){
    for(int i = 0;TeacherList[i].Teacher_ID != 0;i++){
        if(TeacherList[i].Teacher_ID == ID){
            return &TeacherList[i];
        }
    }
    return NULL;
}
//以课程ID搜索课程名称
Course *searchCourse(unsigned int ID){
    for (int i = 0; (CourseList + i)->Course_ID != 0; i++) {
        if ((CourseList + i)->Course_ID == ID){
            return (CourseList + i);
        }
    }
    return NULL;
}
//以学生姓名搜索学生链表内容
Student *searchStuByName(char *name){
    Student *p = pNowStu;
    Student *q = NULL;

    while((p->ID - pNowStu->ID) < 100){
        if(strcmp(p->name,name) == 0){
            return p;
        }
        pPastStu = p;
        q = p->pNext;
        p = q;
    }

    return NULL;
}
//以课程ID搜索教师
Teacher *searchTeaByCourseID(int courseID){
    for (int i = 0;(TeacherList + i)->taughtSubjectsID != 0;i++){
        if ((TeacherList + i)->taughtSubjectsID == courseID){
            return (TeacherList + i);
        }
    }

    return NULL;
}







//输入学生信息
void inputStuInformation_ID(Student *pAddStudent) {
    printf("请输入\n学生ID：");
    fflush(stdin);
    scanf("%d", &pAddStudent->ID);
    while (1) {
        if (searchStudent(pAddStudent->ID) != NULL) {
            printf("该ID已存在，输入不合法！\n"
                   "请重新输入:");
            fflush(stdin);
            scanf("%d", &pAddStudent->ID);
        } else {
            break;
        }
    }
}
//输入、修改学生信息
void inputStuInformation(Student *pAddStudent){
    printf("学生姓名：");
    fflush(stdin);
    scanf("%s",pAddStudent->name);
    printf("学生年龄：");
    fflush(stdin);
    scanf("%d",&pAddStudent->age);
    printf("学生性别：");
    fflush(stdin);
    scanf("%c",&pAddStudent->sex);
    for(int i = 0;i < 16;i++) {
        pAddStudent->course[i] = 0;
        pAddStudent->teacher[i] = 0;
    }
        pAddStudent->class = 0;
}
void inputStuInformationLevelUp(Student *pAddStudent){
    printf("学生姓名：");
    fflush(stdin);
    scanf("%s",pAddStudent->name);
    printf("学生年龄：");
    fflush(stdin);
    scanf("%d",&pAddStudent->age);
    printf("学生性别：");
    fflush(stdin);
    scanf("%c",&pAddStudent->sex);
}
//完善学生信息
void improveStuInformation(Student *pTarget){
    Teacher *pTempTea = NULL;

    //
    if (pTarget->class == 0){
        pTarget->class = pTarget->ID /100;
    }
    //以课程ID完善教师ID
    if (pTarget->course[0] != 0){
        for (int i = 0;pTarget->course[i] != 0;i++){
            pTempTea = searchTeaByCourseID(pTarget->course[i]);
            if (pTempTea == NULL){
                pTarget->teacher[i] = -1;
            }else{
                pTarget->teacher[i] = pTempTea->Teacher_ID;
            }
        }
    }
}


//安全释放学生链表
void safeFreeStu(Student *head){
    Student *p,*q;
    p = head;

    while(p != NULL){
        q = p->pNext;
        free(p);
        p = q;
    }
}
//安全释放课程数据
void safeFreeCour(Course *courseList){
    free(courseList);
}
//安全释放教师数据
void safeFreeTea(Teacher *teacherList){
    free(teacherList);
}
//安全释放数据
void safeFreeAll(Course *courseList,Teacher *teacherList,Student *head){
    safeFreeCour(courseList);
    safeFreeTea(teacherList);
    safeFreeStu(head);
}