Question

Create a C++ or Java program codes for Login Attendance applying the queue principle that will select students from the last attendance login to answer a question.

NOTE: Program execution should include deletion and insertion of attendance information/element

Answer 1

C++ Project on Attendance Management

Features

• This project manages attendance of students
• Admin can register students and create username & password for student
• Student can login, mark attendance of same day & also can see history of attendance
• Please note Admin username is : "admin" , password is "admin@2"
• Compiled on g++ compiler

Source Code

#include <iostream> #include <string> #include <fstream> #include <cstring> using namespace std; int adminView(); int studentView(); int studentLogin(); int checkCredentials(string userName, string password); int getAllStudentsbyRollNo(); int deleteAllStudents(); int deleteStudentbyRollno(); int checkListOfStudentsRegistered(); int checkPresenseCountbyRollno(); int getListOfStudentsWithTheirPresenseCount(); int registerStudent(); int adminLogin(); int registerStudent(); int markMyAttendance(string username); int countMyAttendance(string username); int delay(); int delay() { for(int i = 0; i<3; i ++) { cout<<"\n Saving Records ..."; for(int ii = 0; ii<20000; ii ++) { for(int iii = 0; iii<20000; iii ++) { } } } cout<<"\n Exiting Now ..."; for(int i = 0; i<3; i ++){ for(int ii = 0; ii<20000; ii ++) { for(int iii = 0; iii<20000; iii ++){ } } } return 0; } int adminView() { int goBack = 0; while(1) { system("cls"); cout<<"\n 1 Register a Student"; cout<<"\n 2 Delete All students name registered"; cout<<"\n 3 Delete student by rollno"; cout<<"\n 4 Check List of Student registered by userame"; cout<<"\n 5 Check presense count of any student by Roll No"; cout<<"\n 6 Get List of student with their attendance count"; cout<<"\n 0. Go Back <- \n"; int choice; cout<<"\n Enter you choice: "; cin>>choice; switch(choice) { case 1: registerStudent();break; case 2: deleteAllStudents(); break; case 3: deleteStudentbyRollno(); break; case 4: checkListOfStudentsRegistered(); break; case 5: checkPresenseCountbyRollno(); break; case 6: getListOfStudentsWithTheirPresenseCount(); break; case 0: goBack = 1;break; default: cout<<"\n Invalid choice. Enter again "; getchar(); } if(goBack == 1) { break; //break the loop } } return 0; } int studentLogin() { system("cls"); cout<<"\n -------- Student Login ---------"; studentView(); delay(); return 0; } int adminLogin() { system("cls"); cout<<"\n --------- Admin Login --------"; string username; string password; cout<<"\n Enter username : "; cin>>username; cout<<"\n Enter password : "; cin>>password; if(username=="admin" && password=="admin@2") { adminView(); getchar(); delay(); } else { cout<<"\n Error ! Invalid Credintials.."; cout<<"\n Press any key for main menu "; getchar();getchar(); } return 0; } int checkStudentCredentials(string username, string password) { // read file line by line & check if username-password.dat exist? // if it exsist return 1 else 0 ifstream read; read.open("db.dat"); if (read) { // The file exists, and is open for input int recordFound = 0; string line; string temp = username + password + ".dat"; cout<<"\n file name is : "<<temp; while(getline(read, line)) { if(line == temp) { recordFound = 1; break; } } if(recordFound == 0) return 0; else return 1; } else { return 0; } }

int getAllStudentsbyName()
{
cout<<"\n List of All Students by their Name \n"; 

cout<<"\n Please any key to continue..";
getchar();getchar();

return 0;
}

int getAllStudentsbyRollNo()
{
cout<<"\n List of All Students by their Roll No \n";

cout<<"\n Please any key to continue..";
getchar();getchar();

return 0;               
        
}

int deleteStudentbyRollno()
{
        
cout<<"\n Delete any Student by their Roll No \n";                

cout<<"\n Please any key to continue..";
getchar();getchar();

return 0;
}


int checkPresenseCountbyRollno()
{
cout<<"\n Check presense count of any Student by Roll No \n";     

cout<<"\n Please any key to continue.."   ;
getchar();getchar();

return 0;       
}

int checkAllPresenseCountbyRollno()
{
cout<<"\n Check presense count of All Students by Roll No & Name \n";             
cout<<"\n Please any key to continue.."   ;
getchar();getchar();

return 0;
}

int studentView()
{
cout<<"\n ------- Student Login-------- \n";              

string username, password;

cout<<"\n Enter username : ";
cin>>username;

cout<<"\n Enter password : ";
cin>>password;

int res = checkStudentCredentials(username, password);

if(res  == 0)
{
   cout<<"\n Invalid Credentials !!";
   cout<<"\n Press any key for Main Menu..";
   getchar(); getchar();        
   return 0;
} 

int goBack = 0;
while(1)
{
system("cls");

cout<<"\n 1 Mark Attendance fo Today ";
cout<<"\n 2 Count my Attendance";
cout<<"\n 0. Go Back <- \n";
int choice;

cout<<"\n Enter you choice: ";
cin>>choice;

switch(choice)
{
        case 1: markMyAttendance(username); break;
        case 2: countMyAttendance(username); break;
        case 0: goBack = 1;break;
    default: cout<<"\n Invalid choice. Enter again ";
    getchar();                  
}   

if(goBack == 1)
{
break; //break the loop
}     
        
}
   
}

int markMyAttendance(string username)
{
cout<<"\n Mark Attendance for today !!";  
cout<<"\n Please any key to continue..";
//todo: implement this functionality

getchar();getchar();

return 0;       
} 

int countMyAttendance(string username)
{
cout<<"\n Count my attendace for today !!";       
cout<<"\n Please any key to continue..";
//todo: implment this functionality

getchar();getchar();

return 0;       
} 

int deleteAllStudents()
{
cout<<"\n In delete all students !!";
cout<<"\n Please any key to continue..";
//todo: implement this functionality

getchar(); getchar();
return 0;
}


int checkListOfStudentRegistered()
{
cout<<"\n List of All registered registered !!";
cout<<"\n Please any key to continue..";

//todo: implment this functionality

getchar(); getchar();
return 0;
}

int getListOfStudentsWithTheirPresenseCount()
{
cout<<"\n All Students with their Presense count !!";
cout<<"\n Please any key to continue..";
//todo: implement this functionality

getchar(); getchar();
return 0;
}

int checkListOfStudentsRegistered(){
cout<<"\n - Check List of Student Registered by Username-- ";     

//check if record already exist..
ifstream read;
read.open("db.dat");

if(read)
{   int recordFound =0; 
    string line;
    while(getline(read, line)) {
        char name[100];
        strcpy(name, line.c_str());
        char onlyname[100];
        strncpy(onlyname, name, (strlen(name) - 4));
        cout<<" \n " << onlyname;
    }
     read.close();        
}
else
{
cout<<"\n No Record found :(";
}
        
        
cout<<"\n Please any key to continue..";
getchar(); getchar();
return 0;
}


int registerStudent()
{
    cout<<"\n ----- Form to Register Student ---- \n";    

    string name, username, password, rollno, address, father, mother;
    
    cout<<"\n Enter Name : ";     cin>>name;
    cout<<"\n Enter Username : ";     cin>>username;
    cout<<"\n Enter password : ";     cin>>password;
    cout<<"\n Enter rollno : ";     cin>>rollno;
    getchar();
    
    char add[100];
    cout<<"\n Enter address : ";     cin.getline(add, 100);
    cout<<"\n Enter father : ";     cin>>father;
    cout<<"\n Enter mother : ";     cin>>mother;
    
    //check if record already exist..
    ifstream read;
    read.open("db.dat");
    
    if(read)
    {   int recordFound =0; 
           string line;
            while(getline(read, line)) {
        if(line == username+".dat" )
        {
                recordFound = 1 ;
            break;
                }
        }
        if(recordFound == 1)
        {
        cout<<"\n Username already Register. Please choose another username ";
        getchar(); getchar();
        delay();
        read.close();
        return 0;
                }
        }
    read.close();

    ofstream out;
        out.open("db.dat", ios::app);
        out<<username+".dat"<<"\n";
        out.close();

        ofstream out1;
        string temp = username+".dat";
        out1.open(temp.c_str());
        out1<<name<<"\n";   out1<<username<<"\n";       out1<<password<<"\n";
        out1<<rollno<<"\n";         out1<<add<<"\n";    out1<<father<<"\n";
        out1<<mother<<"\n";
        out1.close();

        cout<<"\n Student Registered Successfully !!";
    
    cout<<"\n Please any key to continue..";
        getchar(); getchar();
        return 0;               
}