学籍管理系统代码(可运行).doc

#include stdio.h#include malloc.h#include string.h#include io.h#define NULL 0#define LEN sizeof(struct student)#define FILE_DATA_PATH c:\student.txt struct student { long int num; char name[20]; int age; char sex[4]; char birthday[10]; char address[30]; long int tele_num; char E_mail[20]; struct student *next;};int TOTAL_NUM = 0;struct student *head = NULL;void welcome();void mainmenu();void record();void insert(struct student *stu);void display(struct student *stu);void displayAll();void query();void query_by_num();void query_by_name();void readData();void writeData();void freeAll();void del();void change();void devise(struct student *p);int main(){ char userName[9]; char userPWD[7]; int i; welcome(); for(i = 0; i 3; i++) { printf(\n管理员初始用户名和密码均为admin\n); printf(请输入您的用户名:); scanf(%s, userName);  printf(\n请输入您的密码:); scanf(%s, userPWD);  if ((strcmp(userName,admin)==0) (strcmp(userPWD,admin)==0)) { //用户名和密码正确，显示主菜单 mainmenu(); break; } else { if (i 2) { //用户名或密码错误，提示用户重新输入 printf(用户名或密码错误，请重新输入!); } else { //连续3次输错用户名或密码，退出系统。 printf(您已连续3次将用户名或密码输错，系统将退出!); } } } return 0;}//显示欢迎信息void welcome(){ printf(+---------------------------+\n); printf(| |\n); printf(| 欢迎使用学生信息管理系统 |\n); printf(| |\n); printf(+---------------------------+\n);}//系统主菜单void mainmenu(){ int choice; choice = -1; readData(); printf(\n温馨提示：为保证您的操作得到保存，请按正常顺序退出系统^_^\n); do { printf(\n\n\n); printf(\t\t\t--------------------------------\n); printf(\t\t\t+ 学生信息管理系统 |\n);  printf(\t\t\t--------------------------------\n);