C语言实现简单学生选课管理系统
本文实例为大家分享了C语言实现学生选课管理系统的具体代码，供大家参考，具体内容如下
这是我们大一C语言课程设计的最终作品，涉及文件读写操作、链表的一系列操作。
源代码由头文件all.h、主函数文件main.cpp以及功能函数文件student.cpp、manager.cpp、common.cpp组成。
涉及的文件读写操作需要先手动创建文件，文件路径可以在all.h的宏定义中更改
使用vs2017的c++编译器，兼容c语言，现贴上源代码和运行截图，供感兴趣的童鞋参考，水平有限还望多多包涵。
运行截图
all.h
#pragma once
#define MAXN 50
#define STU_F "C:\\stu_cour_info_system\\date\\student.txt" //文件存放路径及文件名
#define COUR_F "C:\\stu_cour_info_system\\date\\course.txt" //文件存放路径及文件名
#define MAN_F "C:\\stu_cour_info_system\\date\\manager.txt" //文件存放路径及文件名
#define STU_F_BACKUP "C:\\stu_cour_info_system\\backup\\student.txt" //备份文件存放路径及文件名
#define COUR_F_BACKUP "C:\\stu_cour_info_system\\backup\\course.txt" //备份文件存放路径及文件名
#define MAN_F_BACKUP "C:\\stu_cour_info_system\\backup\\manager.txt" //备份文件存放路径及文件名
struct student //学生信息结构体
{
char name[MAXN]; //姓名
char num[MAXN]; //学号
char sch_cla[20]; //学院和班级
double score_all = 0; //应选总学分
double score_sel = 0; //已选课总学分
char password[9]; //学生登陆密码,共8位
int course_sum; //选课总数
char course[50][MAXN]; //记录选课课程的编号
struct student *next; //链表指针
};
struct course //课程信息结构体
{
char num[MAXN]; //课程编号
char name[MAXN]; //课程名称
char nature[MAXN]; //课程性质
char term[MAXN]; //开课学期
double time_all; //总学时
double time_teach; //授课学时
double time_exp; //实验或上机学时
double score; //该课程学分
int stu_max; //能够容纳的学生总数
int stu_sum; //已经选课学生总数
char stu[100][MAXN]; //已经选课学生学号
struct course *next; //链表指针
};
/*通用函数*/
int judge_num(char *ch); //用于检测输入的字符串ch是否全部为数字,全部为数字则返回1，否则返回0
int input_num(); //用于输入数字，如果输入的全部为数字则返回该数字，否则一直停在输入状态
double input_double(); //用于输入小数
int input_limit(int n); //输入选项，控制输入的数字范围为0-n,在这个范围内则返回该数字，否则一直停在输入状态
int input_limit0(int n);
int keyexam(char *actual_key, char *input_key); //密码检测函数,x为密码位数，actul_key[]为真实密码,input_key为输入密码，密码匹配返回1否则返回0
student* load_stu(); //将学生文件生成链表,返回链表头指针
void store_stu(student *p_head); //将学生链表存入学生文件,需传入链表头指针
course* load_cour(); //将课程文件生成链表，返回链表头指针
void store_cour(course *p_head); //将课程链表存入课程文件，需传入链表头指针
student* locate_end(student *head); //传入头节点，返回尾节点
course* locate_end(course *head); //传入头节点，返回尾节点
void help(); //显示帮助信息
int link_count(student* head);
int link_count(course* head); //计算链表节点数量
int judge_ascii_num(char in[]); //检测输入是否全部为ASCII的数字，是返回1否则返回0
/*管理员函数*/
int man_login(); //管理员登陆函数，密码正确返回1，否则返回0
int man_menu(); //管理员主菜单，返回对应的输入值
void student_add(student *head); //增加学生的函数
void student_delete(student *head); //删除学生的函数
void man_search_stu(student *head); //搜索学生的函数
void student_modify(student *head); //管理员修改学生信息
void course_add(course *head); //增加课程的函数
void course_delete(course *head); //删除课程的函数
void course_modify(course *head); //修改课程信息的函数
void print_all(); //打印所有学生和课程的函数
void man_modifyKey(); //管理员修改密码
void man_backups_recover(); //管理员备份和恢复数据
void courseshowone_man(course *ad); //管理员显示一门课程信息
void courseshowall_man(course *ad); //管理员显示所有课程信息
/*学生函数*/
student* stu_login(student* head); //学生登陆函数，学号和密码都正确则返回链表中该学生的指针，错误则返回null
int stu_menu(); //学生菜单，返回对应的输入值
void student_showone(student *p); //显示一个学生的信息
void student_showall(student *head); //显示所有学生的信息
student *studentnamefind_char(student *head, char tar[]); //根据学生姓名查找学生，如果学生为头节点则返回空指针，不为头节点则返回前一个节点的指针，不存在则返回尾节点
student *studentnamefind_num(student *head, char tar[]); //根据学生学号查找学生，如果学生为头节点则返回空指针，不为头节点则返回前一个节点的指针，不存在则返回尾节点
void stu_modifyKey(student* stu); //学生修改密码
void coursechoose(course* head, student* stu); //选课函数,min为最少要达到的学分
void courseshow_nature(course *head); //根据课程性质查找并显示课程信息
void courseshow_term(course *head); //根据开课学期查找并显示课程信息
void cour_nat_te(course* head); //根据课程性质与开课学期组合查找课程信息
void coursenumfindtip(course *head); //查课子函数
void coursenamefindtip(course *head); //查课子函数2
void stu_dele_cour(course* head, student* stu); //删除已选课程
/*课程函数*/
void course_showone(course *ad); //显示一门的信息
void course_showall(course *head); //显示所有课程的信息
void search_course(course *head); //搜索课程的函数
course *coursenamefind_char(course* head, char tar[]); //根据课程名称查找课程节点，如果课程为头节点则返回空指针，不为头节点则返回前一个节点的指针，不存在则返回尾节点
course *coursenumfind_num(course* head, char tar[]); //根据课程编号查找课程，如果课程为头节点则返回空指针，不为头节点则返回前一个节点的指针，不存在则返回尾节点
main.cpp
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include"all.h"
student* stu_head;
course* cour_head;
course *cour_tail;
student *stu_tail; //这四个指针是全局变量
int main()
{
/*对四个指针变量初始化*/
stu_head = load_stu(); //stu_head指向学生链表头
stu_tail = locate_end(stu_head); //stu_tail指向学生链表尾
cour_head = load_cour(); //cour_head指向课程链表头
cour_tail = locate_end(cour_head); //cour_tail指向课程链表尾
//{/*这段代码用于生成原始管理员密码:10个0；
// 编译链接后执行一次然后注释掉*/
// FILE *fp = fopen(MAN_F, "w+");
// for (int i = 0; i < 10; i++)
// {
// fputc('0', fp);
// }
// fclose(fp);
//}
printf("\n\t\t--------------------------------欢迎使用选课系统！---------------------------------\n");
int status=-1;
while (1)//判断登陆类型
{
status = -1;
printf("\n\n\t\t*****请选择登陆类型 [1]学生 [2]管理员 [3]显示帮助 [0]退出系统:");
status = input_limit0(3);
if ((status == 0) || (status == 1) || (status == 2)||(status==3))
break;
else
printf("\n\t\t##### 输入错误！只能选择1、2或0 #######\n");
}
while (1)
{
if (status == 2)//管理员登陆
{
if (man_login() == 1)
{
printf("\n\n\t\t-----------------------------------管理员登陆成功!--------------------------------\n\n");
int menu_return = man_menu();
while (1)
{
switch (menu_return)
{
case 1:
student_add(stu_head); break;
case 2:
student_delete(stu_head); break;
case 3:
student_modify(stu_head); break;
case 4:
man_search_stu(stu_head); break;
case 5:
course_add(cour_head); break;
case 6:
course_delete(cour_head); break;
case 7:
course_modify(cour_head); break;
case 8:
search_course(cour_head); break;
case 9:
print_all(); break;
case 10:
man_modifyKey(); break;
case 11:
man_backups_recover(); break;
case 0:
break;
default:
printf("\t\t\t#####输入错误，请重新输入######!\n");
}
if (menu_return == 0)
break;
menu_return = man_menu();
}
}
else
printf("\t\t######密码错误，请重新登陆!######\n");
}
else if (status == 1)//student login
{
student* p_stu = stu_login(stu_head);
if (p_stu != NULL)//p_stu为指向该学生的指针
{
printf("\t\t*******请输入登陆密码:");
char input[100];
scanf("%s", input);
while (getchar() != '\n');
if (strcmp(p_stu->password, input) == 0)
{
printf("\n\n\t\t-----------------------------%s 欢迎进入选课系统! ---------------------------------\n\n", p_stu->name);
int menu_return = stu_menu();
while (1)
{
switch (menu_return)
{
case 1:
course_showall(cour_head); break;
case 2:
search_course(cour_head); break;
case 3:
coursechoose(cour_head,p_stu); break;
case 4:
stu_dele_cour(cour_head, p_stu); break;
case 5:
student_showone(p_stu); break;
case 6:
stu_modifyKey(p_stu); break;
case 0:
break;
default:
printf("\t\t######输入错误，请重新输入!######\n");
}
if (menu_return == 0)
break;
menu_return = stu_menu();
}
}
else
{
printf("\t\t#####密码错误，请重新登陆!#######\n");
}
}
else
printf("\t\t#####该学号不存在，请重新登陆!######\n");
p_stu = NULL;
}
else if (status == 3)//显示帮助信息
help();
else if (status == 0)//关闭系统
return 0;
while (1)//再次判断登陆类型
{
status = -1;
printf("\n\n\t\t*****请选择登陆类型 [1]学生 [2]管理员 [3]显示帮助 [0]退出系统:");
status = input_limit0(3);
if ((status == 0) || (status == 1) || (status == 2) || (status == 3))
break;
else
printf("\n\t\t##### 输入错误！只能选择1、2或0 #######\n");
}
}
}
common.cpp
#include<stdio.h>
#include<string.h>
#include"all.h"
#include<stdlib.h>
#include<malloc.h>
#include<ctype.h>
extern student* stu_head;
extern course* cour_head;
extern course *cour_tail;
extern student *stu_tail; // 这四个指针变量在main.cpp中已经声明为全局变量
int keyexam(char *actual_key, char *input_key)//密码正确则返回1，否则返回0
{
if (strcmp(actual_key, input_key) == 0)
return 1;
else
return 0;
}
student* load_stu()//经调试已经正确
{
int count = 0;
FILE *fp;
if ((fp = fopen(STU_F, "r")) == NULL)
{
printf("\t\tcannot open the file:STU_F\n");
exit(0);
}
student* temp = (student*)malloc(sizeof(student));
while (!feof(fp))
{
if (fread(temp, sizeof(student), 1, fp))
count++;
}
free(temp);
temp = NULL;
if (count == 0)
return NULL;
else
{
rewind(fp);
student *p_head = NULL;//文件中有链表信息，则创建一个头指针
p_head = (student*)malloc(sizeof(student));
fread(p_head, sizeof(student), 1, fp);//用文件内容初始化链表节点
p_head->next = NULL;
count--;
student* p_new = p_head;
student* p_end = p_head;
for (int i = 0; i < count; i++)
{
p_new = (student*)malloc(sizeof(student));
fread(p_new, sizeof(student), 1, fp);
p_new->next = NULL;
p_end->next = p_new;
p_end = p_new;
}
fclose(fp);
return p_head;
}
}
void store_stu(student * p_head)//经调试已正确
{
FILE *fp;
if ((fp = fopen(STU_F, "w")) == NULL)//以只写方式打开文件，覆盖以前数据
{
printf("\t***STU_F missed,please quit the system and check for that!\n\n");
exit(0);
}
while (p_head != NULL)//将链表所有节点写入缓冲区
{
fwrite(p_head, sizeof(student), 1, fp);//将链表一个节点写入缓冲区
p_head = p_head->next; //p_head指向下一个节点
}
fclose(fp);//保存文件，清空缓冲区
}
course * load_cour()
{
int count = 0;
FILE *fp;
if ((fp = fopen(COUR_F, "r")) == NULL)
{
printf("\t\tcannot open the file:COUR_F\n");
exit(0);
}
course* temp = (course*)malloc(sizeof(course));
while (!feof(fp))
{
if (fread(temp, sizeof(course), 1, fp))
count++;
}
free(temp);
temp = NULL;
if (count == 0)
return NULL;
else
{
rewind(fp);
course *p_head = NULL;//文件中有链表信息，则创建一个头指针
p_head = (course*)malloc(sizeof(course));
fread(p_head, sizeof(course), 1, fp);//用文件内容初始化链表节点
p_head->next = NULL;
count--;
course* p_new = p_head;
course* p_end = p_head;
for (int i = 0; i < count; i++)
{
p_new = (course*)malloc(sizeof(course));
fread(p_new, sizeof(course), 1, fp);
p_new->next = NULL;
p_end->next = p_new;
p_end = p_new;
}
fclose(fp);
return p_head;
}
}
void store_cour(course * p_head)
{
FILE *fp;
if ((fp = fopen(COUR_F, "w")) == NULL)//以只写方式打开文件，覆盖以前数据
{
printf("\t***COUR_F missed,please quit the system and check for that!\n\n");
exit(0);
}
while (p_head != NULL)//将链表所有节点写入缓冲区
{
fwrite(p_head, sizeof(course), 1, fp);//将链表一个节点写入缓冲区
p_head = p_head->next; //p_head指向下一个节点
}
fclose(fp);//保存文件，清空缓冲区
}
student * locate_end(student * head)
{
student* end = head;
while (head != NULL)
{
end = head;
head = head->next;
}
return end;
}
course* locate_end(course * head)
{
course* end = head;
while (head != NULL)
{
end = head;
head = head->next;
}
return end;
}
void help()
{
int input = -1;
while (1)
{
printf("\n\t\t*****请选择需要的帮助类型 [1]学生帮助 [2]管理员帮助 [3]版权信息 [0]返回主页:");
scanf("%d", &input);
while (getchar() != '\n');
if (input == 0)
break;
else if (input == 1)//学生使用说明
{
printf("\n\t\t--------------------------------学生使用说明---------------------------------------\n");
printf("\t\t密码：初始密码为学号，忘记密码请联系管理员\n");
printf("\t\t\n");
printf("\t\t\n");
printf("\t\t\n");
printf("\t\t-----------------------------------------------------------------------------------\n\n");
}
else if (input == 2)//管理员使用说明
{
printf("\n\t\t-------------------------------管理员使用说明---------------------------------------\n");
printf("\t\t密码:初始密码为10个0，首次使用务必修改密码！\n");
printf("\t\t警告：该软件的文件夹必须放在C盘根目录下，否则不能使用！\n");
printf("\t\t提示：请定时备份数据，防止数据丢失!\n");
printf("\t\t提示：学生学号和课程编号只能是数字!\n");
printf("\t\t------------------------------------------------------------------------------------\n\n");
}
else if (input == 3)//版权信息
{
printf("\n\t\t------------------------------版权信息-------------------------------------------------\n");
printf("\t\t软件名称：学生及课程信息管理系统\n");
printf("\t\t开发人员：焦智洋、文诗波、韩旭\n");
printf("\t\t版本：beta1.0\n");
printf("\t\t版权保护：版权所有，翻版必究\n");
printf("\t\t---------------------------------------------------------------------------------------\n\n");
}
else
printf("\n\t\t#####输入错误，请重新输入！#####\n");
}
}
int link_count(student * head)
{
int count = 0;
while (head != NULL)
{
count++;
head = head->next;
}
return count;
}
int link_count(course * head)
{
int count = 0;
while (head != NULL)
{
count++;
head = head->next;
}
return count;
}
int judge_ascii_num(char in[])
{
int i = 0;
while (in[i]!='\0')
{
if ((in[i] < '0') || (in[i] > '9'))
return 0;
i++;
}
return 1;
}
int judge_num(char *ch)
{
int sum = 0, len = strlen(ch);
for (int i = 0; i < len; i++)
{
if (ch[i] >= '0'&&ch[i] <= '9')
sum++;
}
if (sum == len)
return 1;
else
return 0;
}
int input_num()
{
int num;
char buf[MAXN];
while ((scanf("%s", buf) == 0) || (judge_num(buf) == 0))
{
while (getchar() != '\n');
printf("\n\t\t###输入错误，请重新输入:");
}
num = atoi(buf);
return num;
}
double input_double()
{
double temp = -1.00;
while (1)
{
scanf("%lf", &temp);
while (getchar() != '\n');
if (temp < 0)
printf("\n\t\t#####输入错误，请重新输入:");
else
break;
}
return temp;
}
double judge_input_dou()
{
printf("\n\t\t是否修改该项？[1]修改 [0]不修改:");
int judge = 0;
scanf("%d", &judge);
while (getchar() != '\n');
if (judge == 1)
{
while (1)
{
printf("\n\t\t请输入修改后的内容：");
double in = 0.00;
scanf("%lf", &in);
while (getchar() != '\n');
if (in<=0)
printf("\n\t\t#####输入错误，请重新输入！######");
else
{
return in;
break;
}
}
}
else
return -1.0;
}
course *coursenamefind_char(course* head, char tar[])//根据课程名称查找课程节点，返回前一节点地址
{
course *p, *q;
p = head;
q = NULL;
while (p != NULL)
{
if (strcmp(tar, p->name) == 0)
return q;
q = p;
p = p->next;
}
return q;
}
course *coursenumfind_num(course* head, char tar[])//根据课程编号查找课程
{course *p, *q;
p = head;
q = NULL;
while (p != NULL)
{
if (strcmp(tar, p->num)==0)
return q;
q = p;
p = p->next;
}
return q;
}
student *studentnamefind_char(student *head, char tar[])
{
student *p, *q;
p = head;
q = NULL;
while (p != NULL)
{
if (strcmp(tar, p->name) == 0)
return q;
q = p;
p = p->next;
}
return q;
}
student* studentnamefind_num(student *head, char tar[])
{
student *p, *q;
p = head;
q = NULL;
while (p != NULL)
{
if (strcmp(tar, p->num) == 0)
return q;
q = p;
p = p->next;
}
return q;
}
int input_limit(int n)
{
int m;
while (1)
{
m = input_num();
if (m > 0 && m <= n)
break;
printf("\n\t\t####无此选项，请重新输入!####\n");
}
return m;
}
int input_limit0(int n)
{
int m;
while (1)
{
m = input_num();
if (m >= 0 && m <= n)
break;
printf("\n\t\t####无此选项，请重新输入!####\n");
}
return m;
}
void student_showone(student *p)
{
printf("\n\t\t------------------------------------------------------");
printf("\n\t\t学号：%s", p->num);
printf("\n\t\t姓名：%s", p->name);
printf("\n\t\t学院与班级：%s", p->sch_cla);
printf("\n\t\t密码：%s", p->password);
if (p->course_sum == 0)
printf("\n\t\t该学生无已选课程!\n");
else
{
printf("\n\t\t已选课程:\n");
for (int i = 0; i < p->course_sum; i++)
printf("\t\t\t[%d]:%s\n", i + 1, p->course[i]);
}
printf("\t\t选课总数：%d", p->course_sum);
printf("\n\t\t已选课程总学分：%lf", p->score_sel);
printf("\n\t\t已得学分统计：%lf", p->score_all);
printf("\n\t\t------------------------------------------------------");
}
void student_showall(student *head)
{
student *p;
p = head;
while (p != NULL)
{
student_showone(p);
p = p->next;
}
}
void course_showone(course *ad)
{
if (ad == NULL)
printf("\t\t无课程\n");
else
{
printf("\n\t\t------------------------------------------------------");
printf("\n\t\t课程名称：%s\n", ad->name);
printf("\n\t\t课程编号：%s\n", ad->num);
printf("\t\t课程性质：%s\n", ad->nature);
printf("\t\t开课学期：%s\n", ad->term);
printf("\t\t总学时:%lf\n", ad->time_all);
printf("\t\t授课学时：%lf\n", ad->time_teach);
printf("\t\t实验或上机学时：%lf\n", ad->time_exp);
printf("\t\t学分：%lf\n\n", ad->score);
printf("\n\t\t------------------------------------------------------");
}
}
void course_showall(course *head)
{
course *p;
p = head;
while (p != NULL)
{
course_showone(p);
p = p->next;
}
return;
}
void cour_nat_te(course* head)
{
while (1)
{
printf("\n\t\t请输入要查找课程的性质，返回上级菜单请输入0000：");
char input1[50];
scanf("%s", input1);
while (getchar() != '\n');
if (strcmp(input1, "0000") == 0)
break;
printf("\n\t\t请输入要查找课程的开课学期:");
char input2[50];
scanf("%s", input2);
while (getchar() != '\n');
int count = 0;
while (head != NULL)
{
if ((strcmp(input1, head->nature) == 0) && (strcmp(input2, head->term) == 0))
{
course_showone(head);
count++;
}
head = head->next;
}
if (count == 0)
printf("\n\t\t#####没有符合查找条件的课程！#####\n");
}
}
void search_course(course *head)
{
int flag;
while (true)
{
flag = 0;
printf("\n\t\t请输入查找条件 [1]课程编号 [2]课程名称 [3]课程性质\n\t\t[4]开课学期 [5]课程性质与开课学期 [0]返回上级菜单:");
scanf("%d", &flag);
while (getchar() != '\n');
switch (flag)
{
case(1):coursenumfindtip(head); break;
case(2):coursenamefindtip(head); break;
case(3):courseshow_nature(head); break;
case(4):courseshow_term(head); break;
case(5):cour_nat_te(head); break;
case(0):break;
default:
printf("\n\t\t#####输入错误，请重新输入!#####");
}
if (flag == 0)
break;
}
}
manager.cpp
#include<stdio.h>
#include<string.h>
#include"all.h"
#include<stdlib.h>
#include<malloc.h>
#include<ctype.h>
extern student* stu_head;
extern course* cour_head;
extern course *cour_tail;
extern student *stu_tail; // 这四个指针变量在main.cpp中已经声明为全局变量
int man_login()
{
FILE *fp;
if ((fp = fopen(MAN_F, "r")) == NULL)
{
printf("\t\t#######无法找到文件：MAN_F######\n");
return -1;
}
char key[11];
fread(key, 10, 1, fp);
key[10] = '\0';
fclose(fp);
char input[1000];
printf("\t\t*******请输入管理员密码:");
scanf("%s", input);
while (getchar() != '\n');
if (strcmp(input, key) == 0)
return 1;
else
return 0;
}
int man_menu()
{
printf("\n\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~管理员菜单~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
printf("\n\t\t---[1]:添加学生");
printf("\n\t\t---[2]:删除学生");
printf("\n\t\t---[3]:修改学生信息");
printf("\n\t\t---[4]:查找学生信息\n");
printf("\n\t\t---[5]:添加课程");
printf("\n\t\t---[6]:删除课程");
printf("\n\t\t---[7]:修改课程信息");
printf("\n\t\t---[8]:查找课程信息\n");
printf("\n\t\t---[9]:打印所有课程/学生信息");
printf("\n\t\t---[10]:修改管理员密码");
printf("\n\t\t---[11]:数据备份与恢复");
printf("\n\t\t---[0]:注销\n");
printf("\n\t\t----请从<0-10>中选择操作类型:");
int n = input_limit0(11);
return n;
}
void student_add(student *head) //增加学生的函数
{
while (1)
{
char input[50];
while (1)
{
printf("\n\t\t请输入要添加学生的学号(数字)，返回上级菜单请输入0000：");
scanf("%s", input);
while (getchar() != '\n');
if (judge_ascii_num(input) == 1)
break;
else
printf("\n\t\t####输入错误！#####");
}
if (strcmp(input, "0000") == 0)
break;
if (studentnamefind_num(stu_head, input) != stu_tail)
{
printf("\t\t###已存在该学生,请重新输入!####\n");
continue;
}
/*初始化学生信息*/
student* p = (student *)malloc(sizeof(student));
strcpy(p->num, input);
printf("\t\t请输入学生姓名:");
scanf("%s", p->name);
while (getchar() != '\n');
printf("\t\t请输入学生学院和班级(用--隔开):");
scanf("%s", p->sch_cla);
while (getchar() != '\n');
printf("\t\t请输入当前该学生总学分:");
p->score_all = input_double();
p->course_sum = 0;
p->score_sel = 0.0;
strcpy(p->password, p->num);
if (stu_head == NULL)//当前链表中没有节点
{
p->next = NULL;
stu_head = p;
stu_tail = p;
}
else
{
if (strcmp(p->num, stu_head->num) < 0)//新增节点的标号比头节点还小
{
p->next = stu_head;
stu_head = p;
}
else if (strcmp(p->num, stu_tail->num) > 0)//新增节点的标号比尾节点还大
{
p->next = NULL;
stu_tail->next = p;
stu_tail = p;
}
else//新增节点的标号在头节点和尾节点之间
{
student* temp = stu_head;
while (temp != stu_tail)
{
if (strcmp(p->num, temp->num) > 0)
{
p->next = temp->next;
temp->next = p;
break;
}
}
}
}
printf("\n\t\t学生信息录入成功!\n");
}
store_stu(stu_head);
}
void student_delete(student *head)
{
while (true)
{
printf("\n\t\t请输入要删除学生的学号或姓名,取消删除请输入0000:");
char input[50];
scanf("%s", input);
while (getchar() != '\n');
if (strcmp(input, "0000") == 0)
break;
student *p;
if ((input[0] >= 48) && (input[0] <= 57))
p = studentnamefind_num(stu_head, input);
else
p = studentnamefind_char(stu_head, input);
if (p == stu_tail)//没有该学生
{
printf("\n\t\t####没有该学生信息!#####");
continue;
}
printf("\n\t\t确定删除%s？[1]是 [0]否:", input);
int in = 0;
scanf("%d", &in);
while (getchar() != '\n');
if (in == 1)
{
if (p == NULL)//链表头节点
{
if (stu_head->next == NULL)
{
stu_tail = NULL;
}
student* temp = stu_head;
stu_head = stu_head->next;
free(temp);
temp = NULL;
}
else if (p->next == stu_tail)//链表尾节点
{
p->next = NULL;
free(stu_tail);
stu_tail = p;
}
else//链表中间节点
{
student* delete_point = p->next;
p->next = delete_point->next;
free(delete_point);
delete_point = NULL;
}
printf("\n\t\t已经删除该学生的信息！\n");
}
else
printf("\n\t\t####未删除该学生的信息!####\n");
}
store_stu(stu_head);
}
void student_modify(student *head)
{
char input[100];
student* find = NULL;
while (1)
{
printf("\t\t请输入要修改学生的学号或姓名,取消修改请输入0000:");
scanf("%s", input);
while (getchar() != '\n');
if (strcmp(input, "0000") == 0)
break;
if ((input[0] >= 48) && (input[0] <= 57))//按学号查找
find = studentnamefind_num(head, input);
else//按姓名查找
find = studentnamefind_char(head, input);
if (find == stu_tail)
{
printf("\n\t\t####你所查找的学生不存在！");
continue;
}
else
{
char temp[50];
if (find == NULL)
find = head;
else
find = find->next;
printf("\n\t\t请分别输入需要修改的内容，若某一项不需要修改请输入0");
printf("\n\t\t原姓名:%s 修改后的姓名：", find->name);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
strcpy(find->name, temp);
printf("\t\t原学院和班级:%s 修改后的学院和班级(中间用--隔开)：", find->sch_cla);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
strcpy(find->sch_cla, temp);
printf("\t\t原密码:%s 修改后的密码:", find->password);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
strcpy(find->password, temp);
printf("\t\t原总学分:%lf (增加学分请使用+,减少学分请使用-,例如“-10” “+10”):", find->score_all);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
{
int change = (int)temp[0];
temp[0] = '0';
double number = atof(temp);
if (change == 43)
find->score_all += number;
else if (change == 45)
find->score_all -= number;
}
printf("\t\t修改完成！\n\n");
}
}
store_stu(stu_head);
}
void course_add(course *head)
{
while (1)
{
char input[50];
while (1)
{
printf("\n\t\t请输入要添加课程的编号，返回上一级菜单请输入0000：");
scanf("%s", input);
while (getchar() != '\n');
if (judge_ascii_num(input) == 1)
break;
else
printf("\n\t\t#####输入错误！####");
}
if (strcmp(input, "0000") == 0)
break;
if (coursenumfind_num(cour_head, input) != cour_tail)
{
printf("\t\t###已存在该课程,请重新输入!####\n");
continue;
}
course* p = (course*)malloc(sizeof(course));
/*初始化课程信息*/
strcpy(p->num, input);
printf("\n\t\t请输入课程名称：");
scanf("%s", p->name);
while (getchar() != '\n');
printf("\n\t\t请输入课程性质:");
scanf("%s", p->nature);
while (getchar() != '\n');
printf("\n\t\t请输入课程总学时:");
p->time_all = input_double();
printf("\n\t\t请输入课程授课学时:");
p->time_teach = input_double();
printf("\n\t\t请输入课程实验或上机学时:");
p->time_exp = input_double();
printf("\n\t\t请输入课程最大容纳人数:");
p->stu_max = input_num();
printf("\n\t\t请输入课程学分:");
p->score = input_double();
printf("\n\t\t请输入课程开课学期:");
scanf("%s", p->term);
while (getchar() != '\n');
p->stu_sum = 0;
if (cour_head == NULL)//链表中没有节点
{
p->next = NULL;
cour_head = p;
cour_tail = p;
}
else
{
if (strcmp(p->num, cour_head->num) < 0)//新增节点的标号比头节点还小
{
p->next = cour_head;
cour_head = p;
}
else if (strcmp(p->num, cour_tail->num) > 0)//新增节点的标号比尾节点还大
{
p->next = NULL;
cour_tail->next = p;
cour_tail = p;
}
else//新增节点的标号在头节点和尾节点之间
{
course* temp = cour_head;
while (temp != cour_tail)
{
if (strcmp(p->num, temp->num) > 0)
{
p->next = temp->next;
temp->next = p;
break;
}
}
}
}
printf("\n\t\t课程信息录入成功!\n");
}
store_cour(cour_head);
}
void course_delete(course *head)
{
course *p;
char input[50];
while (true)
{
printf("\n\t\t请输入要删除课程的编号或名称,取消删除请输入0000:");
scanf("%s", input);
while (getchar() != '\n');
if (strcmp(input, "0000") == 0)
break;
if ((input[0] >= 48) && (input[0] <= 57))
p = coursenumfind_num(head, input);
else
p = coursenamefind_char(head, input);
if (p == cour_tail)//没有该课程
{
printf("\n\t\t####没有该课程信息!####"); continue;
}
printf("\n\t\t确定删除%s？[1]是 [0]否:", input);
int in = 0;
scanf("%d", &in);
while (getchar() != '\n');
if (in == 1)
{
if (p == NULL)//链表头节点
{
if (head->next == NULL)
cour_tail = NULL;
course* temp = head;
head = head->next;
cour_head = head;
free(temp);
}
else if (p->next == cour_tail)//链表尾节点
{
free(cour_tail);
p->next = NULL;
cour_tail = p;
}
else//链表中间节点
{
course* delete_point = p->next;
p = (p->next)->next;
free(delete_point);
}
printf("\n\t\t%s已经删除！\n", input);
}
else
printf("\n\t\t#####未删除课程%s的信息!######\n", input);
}
store_cour(cour_head);
}
void course_modify(course *head)
{
char input[100];
course* find = NULL;
while (1)
{
printf("\t\t请输入要修改课程的编号号或名称,取消修改请输入0000:");
scanf("%s", input);
while (getchar() != '\n');
if (strcmp(input, "0000") == 0)
break;
if ((input[0] >= 48) && (input[0] <= 57))//按学号查找
find = coursenumfind_num(head, input);
else//按姓名查找
find = coursenamefind_char(head, input);
if (find == cour_tail)
{
printf("\n\t\t####你所查找的课程不存在！####");
continue;
}
else
{
char temp[50];
if (find == NULL)
find = head;
else
find = find->next;
printf("\n\t\t请分别输入需要修改的内容，若某一项不需要修改请输入0");
printf("\n\t\t原名称:%s 修改后的名称：", find->name);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
strcpy(find->name, temp);
printf("\t\t原性质:%s 修改后的性质：", find->nature);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
strcpy(find->nature, temp);
printf("\t\t原开课学期:%s 修改后的开课学期：", find->term);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
strcpy(find->term, temp);
//int time_all; //总学时
//int time_teach; //授课学时
//int time_exp; //实验或上机学时
//int score; //该课程学分
//int stu_max; //能够容纳的学生总数
printf("\t\t原总学时:%lf 修改后的总学时：", find->time_all);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
find->time_all = atof(temp);
printf("\t\t原授课学时:%lf 修改后的授课学时：", find->time_teach);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
find->time_teach = atof(temp);
printf("\t\t原实验或上机学时:%lf 修改后的实验或上机学时：", find->time_exp);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
find->time_exp = atof(temp);
printf("\t\t原课程学分:%lf 修改后的课程学分：", find->score);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
find->score = atof(temp);
printf("\t\t原能容纳学生总数:%d 修改后的能容纳学生总数：", find->stu_max);
scanf("%s", &temp);
while (getchar() != '\n');
if (strcmp(temp, "0") != 0)
find->stu_max = atoi(temp);
printf("\t\t修改完成！\n\n");
}
}
store_cour(cour_head);
}
void print_all()
{
while (1)
{
printf("\n\t\t选择操作类型: [1]打印所有学生信息 [2]打印所有课程信息 [0]返回主菜单:");
int input = 0;
scanf("%d", &input);
while (getchar() != '\n');
if (input == 1)
{
printf("\n\t\t学生总数：%d", link_count(stu_head));
student_showall(stu_head);
}
else if (input == 2)
{
printf("\n\t\t课程总数：%d\n", link_count(cour_head));
courseshowall_man(cour_head);
}
else if (input == 0)
break;
else
printf("\n\t\t####输入错误！请重新输入!#####\n");
}
}
void man_modifyKey()
{
printf("\t\t******请输入原密码(10位):");
char input[20];
scanf("%s", input);
while (getchar() != '\n');
FILE *fp;
if ((fp = fopen(MAN_F, "r")) == NULL)
{
printf("\t\t-------- 无法打开文件:MAN_F\n");
exit(0);
}
char keyOld[11];
fread(keyOld, 10, 1, fp);
keyOld[10] = '\0';
if (strcmp(keyOld, input) == 0)//修改
{
fclose(fp);
char new1[100];
char new2[100];
while (1)
{
printf("\t\t*******请输入新密码（10位）:");
scanf("%s", new1);
while (getchar() != '\n');
printf("\t\t******请再次确认新密码（10位）:");
scanf("%s", new2);
while (getchar() != '\n');
if (keyexam(new1, new2) == 1)
{
fp = fopen(MAN_F, "w");
fwrite(new1, 10, 1, fp);
fclose(fp);
printf("\n\t\t------密码修改成功!\n");
break;
}
else
printf("\t\t####前后密码不一致，请重新输入！####\n");
}
}
else
{
fclose(fp);
printf("\t\t####原密码输入错误，请重新选择操作类型####\n");
}
}
void man_backups_recover()
{
printf("\t\t*****[1]数据备份 [2]数据恢复 [3]取消\n");
printf("\t\t*****选择操作类型:");
int input = 0;
scanf("%d", &input);
while (getchar() != '\n');
if (input == 1)
{
FILE *fp_source;
FILE *fp_destination;
{//课程信息备份
if ((fp_source = fopen(COUR_F, "r")) == NULL)
{
printf("\t\t##课程数据备份失败：无法找到COUR_F文件！##\n");
exit(0);
}
fp_destination = fopen(COUR_F_BACKUP, "w");
char temp;
int count = 0;
while (!feof(fp_source))
{
if (fread(&temp, 1, 1, fp_source))
count++;
}
rewind(fp_source);
for (int i = 0; i < count; i++)
{
fread(&temp, 1, 1, fp_source);
fwrite(&temp, 1, 1, fp_destination);
}
fclose(fp_destination);
fclose(fp_source);
}
{//学生信息备份
if ((fp_source = fopen(STU_F, "r")) == NULL)
{
printf("\t\t##学生数据备份失败：无法找到STU_F文件！##\n");
exit(0);
}
fp_destination = fopen(STU_F_BACKUP, "w");
char temp;
int count = 0;
while (!feof(fp_source))
{
if (fread(&temp, 1, 1, fp_source))
count++;
}
rewind(fp_source);
for (int i = 0; i < count; i++)
{
fread(&temp, 1, 1, fp_source);
fwrite(&temp, 1, 1, fp_destination);
}
fclose(fp_destination);
fclose(fp_source);
}
{//管理员信息备份
if ((fp_source = fopen(MAN_F, "r")) == NULL)
{
printf("\t\t##管理员数据备份失败：无法找到MAN_F文件！##\n");
exit(0);
}
fp_destination = fopen(MAN_F_BACKUP, "w");
char temp;
for (int i = 0; i < 10; i++)
{
fread(&temp, 1, 1, fp_source);
fwrite(&temp, 1, 1, fp_destination);
}
fclose(fp_destination);
fclose(fp_source);
}
printf("\n\t\t所有数据已经备份完毕！备份目录为C:\ stu_cour_info_system\backup\n");
}
else if (input == 2)
{
printf("\t\t选择恢复类型:[1]课程数据 [2]学生数据 [3]管理员数据:");
int in = 0;
scanf("%d", &in);
while (getchar() != '\n');
FILE *fp_source;
FILE *fp_destination;
if (in == 1)//course information recover
{ //课程信息恢复
if ((fp_source = fopen(COUR_F_BACKUP, "r")) == NULL)
{
printf("\t\t###课程信息恢复失败！未能找到C:\\stu_cour_info_system\\backup\\course_back.txt###\n");
exit(0);
}
fp_destination = fopen(COUR_F, "w");
char temp;
int count = 0;
while (!feof(fp_source))
{
if (fread(&temp, 1, 1, fp_source))
count++;
}
rewind(fp_source);
for (int i = 0; i < count; i++)
{
fread(&temp, 1, 1, fp_source);
fwrite(&temp, 1, 1, fp_destination);
}
fclose(fp_destination);
fclose(fp_source);
printf("\n\t\t课程信息恢复成功！\n");
cour_head = load_cour();
cour_tail = locate_end(cour_head);
}
else if (in == 2)//student information recover
{ //学生信息恢复
if ((fp_source = fopen(STU_F_BACKUP, "r")) == NULL)
{
printf("\t\t###学生信息恢复失败！未能找到C:\\stu_cour_info_system\\backup\\student_back!###\n");
exit(0);
}
fp_destination = fopen(STU_F, "w");
char temp;
int count = 0;
while (!feof(fp_source))
{
if (fread(&temp, 1, 1, fp_source))
count++;
}
rewind(fp_source);
for (int i = 0; i < count; i++)
{
fread(&temp, 1, 1, fp_source);
fwrite(&temp, 1, 1, fp_destination);
}
fclose(fp_destination);
fclose(fp_source);
printf("\n\t\t学生数据恢复成功！\n");
stu_head = load_stu();
stu_tail = locate_end(stu_head);
}
else if (in == 3)//manager information recover
{
//恢复管理员数据
if ((fp_source = fopen(MAN_F_BACKUP, "r")) == NULL)
{
printf("\t\t###管理员数据恢复失败！未能找到C:\\stu_cour_info_system\\backup\\course_back\n");
exit(0);
}
fp_destination = fopen(MAN_F, "w");
char temp;
for (int i = 0; i < 10; i++)
{
fread(&temp, 1, 1, fp_source);
fwrite(&temp, 1, 1, fp_destination);
}
fclose(fp_destination);
fclose(fp_source);
printf("\n\t\t管理员数据恢复成功！\n");
}
else
printf("\t\t###输入错误！###\n");
}
else if (input == 3)
;
else
printf("\t\t###输入错误，请重新输入!####\n");
}
void man_search_stu(student *head)
{
while (1)
{
printf("\n\t\t请输入学号或姓名进行查找，返回上级菜单请输入0000：");
char input[50];
scanf("%s", input);
while (getchar() != '\n');
if (strcmp(input, "0000") == 0)
break;
student* p_stu;
if ((input[0] >= 48) && (input[0] <= 57))
p_stu = studentnamefind_num(head, input);
else
p_stu = studentnamefind_char(head, input);
if (p_stu == stu_tail)
{
printf("\n\t\t#####没有该学生的信息，请重新输入！#####/n");
continue;
}
if (p_stu == NULL)
p_stu = head;
else
p_stu = p_stu->next;
printf("\n\t\t该学生信息如下：");
student_showone(p_stu);
}
}
void courseshowone_man(course *ad)
{
if (ad == NULL)
printf("无课程");
else
{
printf("\n\t\t------------------------------------------------------");
printf("\n\t\t课程编号：%s\n", ad->num);
printf("\t\t课程名称：%s\n", ad->name);
printf("\t\t课程性质：%s\n", ad->nature);
printf("\t\t开课学期：%s\n", ad->term);
printf("\t\t总学时:%lf\n", ad->time_all);
printf("\t\t授课学时：%lf\n", ad->time_teach);
printf("\t\t实验或上机学时：%lf\n", ad->time_exp);
printf("\t\t学分：%lf\n", ad->score);
printf("\t\t总容纳学生人数：%d\n", ad->stu_max);
printf("\t\t已选学生人数：%d\n", ad->stu_sum);
printf("\t\t已选学生：\n");
if (ad->stu_sum == 0)
printf("\t\t没有人选该课程\n");
else
for (int i = 0; i <ad->stu_sum; i++)
{
if (i % 5 == 0)
printf("\t\t");
student* temp = studentnamefind_num(stu_head, ad->stu[i]);
if (temp == NULL)
temp = stu_head;
else
temp = temp->next;
printf("[%d] %s", i + 1, temp->name);
if (i > 0 && i % 5 == 0)
printf("\n");
}
printf("\n\t\t------------------------------------------------------");
}
}
void courseshowall_man(course *head)
{
course *p;
p = head;
if (p == NULL)
{
printf("\t\t无课程\n");
return;
}
while (p != NULL)
{
courseshowone_man(p);
p = p->next;
}
}
studetn.cpp
#include<stdio.h>
#include<string.h>
#include"all.h"
#include<stdlib.h>
#include<malloc.h>
#include<ctype.h>
extern student* stu_head;
extern course* cour_head;
extern course *cour_tail;
extern student *stu_tail;// 这四个指针变量在main.cpp中已经声明为全局变量
student* stu_login(student* head)
{
student* copy_head = head;
char input[100];
printf("\t\t*******请输入学号:");
scanf("%s", input);
while (getchar() != '\n');
student* temp;
temp = studentnamefind_num(head, input);
if (temp == NULL)//the first student
return copy_head;
else if ((temp != NULL) && (temp->next == NULL))//no such a student
return NULL;
else
return temp->next;
}
int stu_menu()
{
printf("\n\t\t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~学生菜单~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
printf("\n\t\t---[1]:打印课程信息");
printf("\n\t\t---[2]:查找课程信息");
printf("\n\t\t---[3]:选择新的课程");
printf("\n\t\t---[4]:删除已选课程");
printf("\n\t\t---[5]:查看个人信息");
printf("\n\t\t---[6]:修改登陆密码");
printf("\n\t\t---[0]:注销");
printf("\n\n\t\t---请从<0-6>中选择操作类型:");
int n = input_limit0(6);
return n;
}
void courseshow_nature(course *head)
{
course *p;
char ad[MAXN];
while (true)
{
int flag = 0, sum = 0;
p = head;
printf("\t\t请输入要查找课程的性质,取消查找请输入0000:");
scanf("%s", ad);
while (getchar() != '\n');
if (strcmp(ad, "0000") == 0)
break;
while (p != NULL)
{
if (strcmp(ad, p->nature) == 0)
{
course_showone(p);
flag = 1;
sum++;
}
p = p->next;
}
if (flag == 0)
printf("\n\t\t没有该课程！####");
}
return;
}
void courseshow_term(course *head)
{
course *p;
char ad[MAXN];
while (true)
{
int flag = 0, sum = 0;
p = head;
printf("\t\t请输入要查找课程的开课学期,取消查找请输入0000:");
scanf("%s", ad);
while (getchar() != '\n');
if (strcmp(ad, "0000") == 0)
break;
while (p != NULL)
{
if (strcmp(ad, p->term) == 0)
{
course_showone(p);
flag = 1;
sum++;
}
p = p->next;
}
if (flag == 0)
printf("\n\t\t#####没有该课程!#####");
}
return;
}
void coursechoose( course* head, student* stu)//选课函数
{
if (stu->score_sel <stu->score_all )
printf("\n\t\t你的总学分少于%lf,赶快去选课吧！\n", stu->score_all);
while (1)
{
printf("\n\t\t请输入课程的编号或名称进行选课，取消选课请输入0000:");
char input[50];
scanf("%s", input);
while(getchar()!='\n');
if (strcmp(input, "0000")==0)
break;
course* find = NULL;
if ((input[0] >= 48) && (input[0] <= 57))
find = coursenumfind_num(head, input);
else
find = coursenamefind_char(head, input);
if (find == cour_tail)
{
printf("\n\t\t#####该课程不存在!请重新输入#####\n");
continue;
}
else if (find == NULL)
find = head;
else
find = find->next;
if (find->stu_sum == find->stu_max)
printf("\n\t\t####该课程人数已满,无法选择!#####\n");
else
{
int judge = 0;
for (int i = 0; i < stu->course_sum; i++)
{
if (strcmp(stu->course[i], find->num)==0)
{judge = 1; break;}
}
if (judge == 1)
{
printf("\n\t\t####该课程已经选择过了!####\n");
continue;
}
else
{
stu->course_sum++;
strcpy(stu->course[stu->course_sum - 1], find->num);
stu->score_sel += find->score;
find->stu_sum++;
strcpy(find->stu[find->stu_sum - 1], stu->num);
printf("\n\t\t该课程选择成功!\n");
}
}
}
store_cour(cour_head);
store_stu(stu_head);
}
void coursenumfindtip(course *head)
{
char buf[MAXN];
course *result;
while (true)
{
printf("\t\t请输入要查找课程的编号,取消查找请输入0000:");
scanf("%s", buf);
while (getchar() != '\n');
if (strcmp(buf, "0000") == 0)
break;
result = coursenumfind_num(head, buf);
if (result != cour_tail)
{
if (result == NULL)
result = head;
else
result = result->next;
course_showone(result);
}
else
printf("\t\t#####没有该课程！#####\n");
}
}
void coursenamefindtip(course *head)
{
char buf[MAXN];
course *result;
while (1)
{
printf("\t\t请输入要查找课程的名称,取消查找请输入0000:");
scanf("%s", buf);
while (getchar() != '\n');
if (strcmp(buf, "0000") == 0)
break;
result = coursenamefind_char(head, buf);
if (result != cour_tail)
{
if (result == NULL)
result = head;
else
result = result->next;
course_showone(result);
}
else
printf("\t\t#####无所查找的课程!#####\n");
}
}
void stu_dele_cour( course * head, student * stu)
{
while (1)
{
printf("\n\t\t请输入需要删除课程的编号,返回上级菜单请输入0000:");
char input[50];
scanf("%s", input);
while (getchar() != '\n');
if (strcmp(input, "0000") == 0)
break;
int i = 0, result = -1;
/*删除该学生记录中选课的信息*/
for (; i < stu->course_sum; i++)
{
if (strcmp(input, stu->course[i]) == 0)
{ result = i; break; }
}
if (result == -1)
{printf("\n\t\t####你没有选择这门课程！请重新输入!");continue;}
strcpy(stu->course[result], stu->course[stu->course_sum - 1]);
stu->course_sum--;
course* find= coursenumfind_num(head, input);
if (find == NULL)
find = head;
else
find =find->next;
/*删除该课程记录中学生的信息*/
i = 0, result = 0;
for (; i < find->stu_sum; i++)
{
if(strcmp(input,find->stu[i])==0)
{ result = i; break;}
}
strcpy(find->stu[result], find->stu[find->stu_sum - 1]);
find->stu_sum --;
printf("\n\t\t课程删除成功!\n");
}
store_stu(stu_head);
store_cour(cour_head);
}
void stu_modifyKey(student* stu)
{
printf("\t\t******请输入原密码(8位):");
char input[20];
scanf("%s", input);
while (getchar() != '\n');
char keyOld[10];
strcpy(keyOld, stu->password);
if (keyexam(keyOld, input) == 1)//修改
{
char new1[100];
char new2[100];
while (1)
{
printf("\t\t*******请输入新密码（8位）:");
scanf("%s", new1);
while (getchar() != '\n');
printf("\t\t******请再次确认新密码（8位）:");
scanf("%s", new2);
while (getchar() != '\n');
if (keyexam(new1, new2) == 1)
{
strcpy(stu->password, new1);
store_stu(stu_head);
printf("\n\t\t------密码修改成功!\n");
break;
}
else
printf("\t\t####前后密码不一致，请重新输入！####\n");
}
}
else
printf("\t\t####原密码输入错误，请重新选择操作类型####\n");
}
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以上是 C语言实现简单学生选课管理系统 的全部内容， 来源链接： utcz.com/p/244271.html
