void login() {
system("clear");
int t, y, ch;
printf(" \n");
printf("1. Add Member\n");
printf("2. View Member\n");
printf("3. Back to Administrator\n");
printf("4. Close application\n\n");
scanf("%d", &ch);
switch(ch) {
case 1:
addstudent();
break;
case 2:
viewstudent();
break;
case 3:
start();
break;
case 4: {
system("clear");
exit(0);
}
default:
printf("\aYou entered wrong chioce");
start();
}
}
void student()
{
char ch;
do
{
system("cls");
printf("\n\n 1.Add New Student");
printf("\n\n 2.Search Student Information");
printf("\n\n 3.Update Student Information");
printf("\n\n 4.Display All Information");
printf("\n\n 5.Remove All Data");
printf("\n\n 6.Exit from Student Database");
printf("\n\n Enter your choice :- ");
fflush(stdin);
scanf("%c",&ch);
if(ch=='1')
{
addstudent();
}
else if(ch=='2')
{
searchstudent();
}
else if(ch=='3')
{
updatestudent();
}
else if(ch=='4')
{
displaystudent();
}
else if(ch=='5')
{
deletestudent();
}
else if(ch=='6')
{
break;
}
else
{
printf("\n\n You have entered a wrong choice");
getch();
}
}while(1);
}
int main()
{
//打开文件
int fd = open("stu.dat", O_RDWR|O_CREAT, 0600);
if(fd<0){
printf("无法打开文件stu.dat\n");
return 1;
}
int cnt = lseek(fd, 0, SEEK_END)/sizeof(Stu);
printf("已有学生人数:%d\n", cnt);
//反复让用户选择操作
for(;;){
int ch = choose();
if(ch=='0') break;
else if(ch=='1') addstudent(fd,&cnt);
else if(ch=='2') setscore(fd,&cnt);
else if(ch=='3') liststudent(fd,&cnt);
else{/*不可能*/}
}
//退出时关闭文件，保证数据能保存到文件中
close(fd);
return 0;
}
int main() {
int choice1, choice2, choice3, choice4, ch;
char pw[20];
char name[20], contact[11], e_mail[120], city[20], dist[20], pin[10], state[30], admdate[20];
int attendance[12][31], p = 0, a = 0, b = 0, charge = 0, n = 0;
unsigned int id, rmn, mnth, dt;
// date admdate;
address addr1;
FILE *ptr;
student s;
while(1) {
logout:
choice1 = printmenu1();
switch(choice1) {
case 1: /*Login*/
choice2 = printmenu2();
switch(choice2) {
case 1: /*Admin*/
printf("Enter password\n");
scanf("%s", pw);
if(strcmp(pw, "lovefood") == 0){
while(1) {
choice3 = printmenu3();
//printf("choice3 is %d", choice3);
switch(choice3) {
case 1: /*Add a student*/
printf("Enter name: ");
getchar();
readline(name, 20);
printf("student id: ");
scanf("%u", &id);
printf("Room no.: ");
scanf("%u", &rmn);
printf("contact no.: ");
getchar();
readline(contact, 11);
printf("Email id: ");
getchar();
readline(e_mail, 128);
printf("Enter date of admission: ");
getchar();
readline(admdate, 20);
//scanf("%d %d %d", &admdate.dd, &admdate.mm,&admdate.yyyy);
printf("city: ");
getchar();
readline(addr1.city, 20);
printf("District: ");
getchar();
readline(addr1.dist, 20);
printf("pincode: ");
getchar();
readline(addr1.pin, 10);
printf("state: ");
getchar();
readline(addr1.state, 30);
addstudent(name, id, rmn, admdate, contact, e_mail, addr1);
break;
case 2: /*Edit a student record*/
printf("Enter the student id whose record you want to edit: ");
scanf("%u",&id);
printf( " 1. Edit student details\n"
" 2. Edit student address \n");
//" 3. Edit student Fee details\n");
scanf("%d", &ch);
switch(ch) {
case 1: /*edit student details*/
printf( " 1. Edit name\n"
" 2. Edit room no.\n"
" 3. Edit contact no\n"
" 4. Edit email id\n");
scanf("%d", &ch);
//" 5. Edit date of admission\n"\
" 6. Edit attendance\n"\);
switch(ch){
case 1:/*edit name*/
printf("Enter the student name: ");
getchar();
readline(name, 20);
printf("ABC");
editname(name, id);
break;
case 2:/*edit room no.*/
printf("Enter room no.: ");
scanf("%u", &rmn);
editroom_no(rmn, id);
break;
case 3:/*edit contact no.*/
printf("Enter contact no.: ");
getchar();
readline(contact, 11);
editcontact(contact, id);
break;
case 4:/*edit email id*/
printf("Enter email: ");
getchar();
readline(e_mail, 128);
editemail(e_mail, id);
break;
default:
printf("Invalid entry");
}
break;
//}
/*case 5:edit date of admission
printf("Enter day,month and year");
scanf("%d %d %d",&d,&m,&y);
editadmissiondate(dt, id);
break;
case 6:edit attendance
printf("Enter absentee or presentee");
scanf("%c",&attendance);
editattendance(attendance, id);
break;
}
*/
case 2:/*edit student address*/
printf( " 1.Edit city\n"
" 2.Edit District\n"
" 3.Edit state\n"
" 4.Edit pincode\n");
scanf("%d", &ch);
switch(ch){
case 1:/*edit city*/
printf("Enter city: ");
getchar();
readline(city, 20);
editcity(city, id);
break;
case 2:/*edit district*/
printf("Enter district: ");
getchar();
readline(dist, 20);
editdistrict(dist, id);
break;
case 3:/*edit state*/
printf("Enter state: ");
getchar();
readline(state, 20);
editstate(state, 20);
break;
case 4:/*edit pincode*/
printf("Enter pincode: ");
getchar();
readline(pin, 10);
editpincode(pin, id);
break;
default:
printf("Invalid entry");
}
break;
}
break;
case 3: /* search for a student */
printf( " 1.search by ID\n"
" 2.search by contact\n"
" 3.search by email\n");
scanf("%d", &ch);
switch(ch){
case 1:/*search by ID*/
printf("Enter ID: \n");
scanf("%u", &id);
searchbyid(id);
break;
case 2:/*search by contact*/
printf("Enter contact: \n");
scanf("%s", contact);
searchbycontact(contact);
break;
case 3:/*search by email*/
printf("Enter email: \n");
scanf("%s", e_mail);
searchbyemail(e_mail);
break;
default:
printf("Invalid entry");
break;
}
break;
case 4: /* mark attendance (initialising attendance to zero)*/
printf("ID of the student: ");
scanf("%u", &id);
printf("month: ");
scanf("%u", &mnth);
markattendance(id, mnth);
printf(" All attendance successfully marked to zero\n");
break;
case 5: /* mark presentee */
printf("Enter the student ID: ");
scanf("%u", &id);
printf("Enter month in number: ");
scanf("%u", &mnth);
printf("date:");
scanf("%u", &dt);
markpresentee(id, mnth, dt);
printf(" Presentee successfully marked\n");
break;
case 6:/* Edit attendance */
printf("Enter the student ID: ");
scanf("%u", &id);
printf("Edit attendance of month: ");
scanf("%u", &mnth);
printf("Edit attendance of date: ");
scanf("%u", &dt);
editattendance(mnth, dt, id);
printf(" Attendance edited successfully\n");
break;
case 7:/*calculate monthly bill*/
printf("Enter the student ID: ");
scanf("%u", &id);
printf("Enter the month: ");
scanf("%u", &mnth);
printf("Charge per meal: ");
scanf("%d", &charge);
printf("No of meals per day: ");
scanf("%d", &n);
p = 0;
p = calpresentdays(id, mnth);
printf("No of present days is %d\n", p);
b = calmonthlybill(p, charge, n);
printf(" Monthly bill is %d ", b);
break;
case 8:/*view student*/
printf("Enter the student ID: ");
scanf("%u", &id);
viewstudent(id);
break;
case 9:/*Logout*/
goto logout;
break;
case 10: /*exit */
return;
default:
("Invalid entry");
break;
}
}
}
else {
printf(" WRONG PASSWORD\n");
break;
}
case 2:/*student*/
printf(" Enter your ID ");
scanf("%u", &id);
ptr = fopen("students", "a+");
if(ptr == NULL) {
printf("Operation failed. Try again.\n");
break;
}
while(fread(&s, sizeof(s), 1, ptr) == 1) {
if(id == s.id && s.id != 0) {
printf("\n ID : %u\n"\
" Name : %s\n"\
" Contact : %s\n", s.id, s.name, s.contact);
while(1) {
choice4 = printmenu4();
switch(choice4) {
case 1: /*view student*/
printf("Enter the student ID: ");
scanf("%u", &id);
viewstudent(id);
break;
case 2: /*view no. of absent days*/
printf("Enter the student ID: ");
scanf("%u", &id);
printf("Month: ");
scanf("%u", &mnth);
a = calabsentdays(id, mnth);
printf("Number of absent days is %d", a);
break;
case 3:/*Logout*/
goto logout;
break;
case 4: /*exit */
exit(0);
break;
default:
printf("Invalid entry");
break;
}
}
}
}
break;
fclose(ptr);
printf(" Invalid ID. Register your ID first. ");
break;
}
case 2:/*create new student id*/
printf(" Enter your Name ");
getchar();
readline(name, 20);
printf(" Enter your contact no ");
readline(contact, 11);
printf(" Enter your ID no ");
scanf("%u", &id);
break;
default:
printf("Invalid entry");
break;
}
}
return 0;
}
