New Feature added-To Delete a member's record

README.md

@@ -1 +1,19 @@
-# ncs_attendance
+#NCS Attendance
+
+Features-
+
+* **Quick attendance**. Marks present by simply pressing ENTER key, pressing anything else marks absent.
+* Keeps a record of **Presence, Absence and total attendance**.
+* View database.
+* Modify any attendance record.
+* Add new Members.
+* Highly robust; hence easy to use.
+* Works with **g++ compiler 4.9** on any platform.
+* **new** View attendance record of any member with record of days missed.
+
+To contribute-
+* Download/Clone this repository and study _attendance.class_.
+* Compile main.cpp using **g++** compiler. (g++ 4.9) 
+* Test with provided BLANK database or ask for original database from **authorized member**.
+
+**_P.S._** While Compiling the code, you may notice many WARNINGS. Ignore them since they refer to vulnerable traversal in database and program is optimized against vulnerable traversal. **Executable file wil be ultimately created**.

attendance.class

@@ -0,0 +1,321 @@
+#include <fstream>
+#include <iostream>
+#include <iomanip>
+#include <cstdio>
+#include <cstring>
+#include <stdlib.h>
+using namespace std;
+int x;
+class attendance
+{
+	char name[25];
+	int att,ab,total,srno,j;
+	char tempd[12],date[100][12];
+public:
+	void day();
+	void begin();
+	void getdat();
+	void show();
+	void save();
+	void task();
+	void update();
+	void newm();
+	void clear();
+	void end();
+	void caditshow();
+	void name_change();
+	void mem_delete();
+	attendance()
+	{
+		strcpy(name,"NULL");
+		strcpy(tempd,"NULL");
+		att=ab=total=srno=j=0;
+	}
+};
+
+void attendance::day()
+{
+	if(strcmp(tempd,"NULL")==0)
+	{
+		clear();
+		printf("Enter todays date (dd/mm/yy)- ");
+		cin.ignore();
+		cin.getline(tempd,sizeof(tempd));
+	}
+}
+
+void attendance::begin()
+{
+	clear();
+	printf("Welcome to NCS Attendance\n");
+	printf("What would you like to do??\n");
+	printf("1. Take Attendance\n2. See Attendance record\n");
+	printf("3. Update any record\n4. Add new members!\n");
+	printf("5. View specific member's attendance record. \n");
+	printf("6. Edit name of a member.\n7. Delete specific member.\n");
+}
+
+
+void attendance::getdat()
+{
+
+	ifstream f0("database.dat",ios::binary);
+	attendance ob;
+	while(!f0.eof())
+		f0.read((char*)&ob,sizeof(ob));
+	if(ob.srno==0)
+		srno++;
+	else
+		srno=ob.srno+1;
+	f0.close();
+	cin.ignore();
+	printf("Enter name of Member\n");
+	cin.getline(name,sizeof(name));
+	printf("Enter attendance (if present earlier/required)\n");
+	cin>>att;
+	x=ob.srno;
+	cin.ignore();
+}
+
+void attendance::clear()
+{
+	cout <<"\033[2J\033[1;1H";
+}
+void attendance::save()
+{
+	ofstream f1("database.dat",ios::app|ios::binary);
+	f1.write((char*)this,sizeof(*this));
+	f1.close();
+	printf("Data Saved successfully.\n");
+}
+
+void attendance::show()
+{
+	printf("\n\n");
+	ifstream f2("database.dat",ios::binary);
+	attendance ob;
+	f2.read((char*)&ob,sizeof(ob));
+	printf("Total Working days- %d \n",ob.total);
+	cout<<left<<setw(25)<<"Sr.no NAME"<<"PRESENCE"<<" | "<<"ABSENCE"<<endl;
+	while(!f2.eof())
+	{
+		if(ob.srno>9&&(ob.att>9||ob.ab>9))
+			cout<<ob.srno<<" "<<left<<setw(28)<<ob.name<<ob.att<<" | "<<ob.ab<<endl;
+		else if(ob.srno>9||(ob.att>9||ob.ab>9))
+			cout<<ob.srno<<" "<<left<<setw(29)<<ob.name<<ob.att<<" | "<<ob.ab<<endl;
+		else
+			cout<<ob.srno<<" "<<left<<setw(30)<<ob.name<<ob.att<<" | "<<ob.ab<<endl;		
+		f2.read((char*)&ob,sizeof(ob));
+	}
+	f2.close();
+}
+
+
+void attendance::task()
+{
+	fstream f3("database.dat",ios::binary|ios::in|ios::out);
+	attendance obj;
+	f3.read((char*)&obj,sizeof(obj));
+	while(!f3.eof())
+	{
+		if(obj.srno>9)
+			cout<<obj.srno<<" "<<left<<setw(29)<<obj.name<<obj.att<<" | "<<obj.ab<<endl;
+		else
+			cout<<obj.srno<<" "<<left<<setw(30)<<obj.name<<obj.att<<" | "<<obj.ab<<endl;
+		string temp;
+		getline(cin,temp);
+		if(temp.empty())
+			++(obj.att);
+		else
+		{	++(obj.ab);		strcpy(obj.date[obj.j],tempd);	obj.j++;	}
+		obj.total++;
+		f3.seekp(f3.tellp()-sizeof(obj));
+		f3.write((char*)&obj,sizeof(obj));
+		f3.read((char*)&obj,sizeof(obj));
+	}
+	f3.close();
+}
+
+void attendance::update()
+{
+	while(1)
+	{
+		fstream f4("database.dat",ios::in|ios::out|ios::binary);
+		attendance ob;
+		int flag=1,no;
+		char choice;
+		show();
+		cout<<"Enter the serial number of member reffering the above attendance list\n";
+		cin>>no;
+		f4.read((char*)&ob,sizeof(ob));
+		while(!f4.eof())
+		{
+			if(no==ob.srno)
+			{
+				cout<<"\n"<<ob.srno<<" "<<left<<setw(30)<<ob.name<<ob.att<<" | "<<ob.ab<<endl;
+				while(1)
+				{
+						printf("Were you present?? (Y/N)\n");
+					cin>>choice;
+					if(choice=='Y'||choice=='y')
+						{	ob.att++; ob.ab--;	ob.j--;	break; }
+					else if(choice=='N'||choice=='n')
+						{	ob.att--; ob.ab++;	strcpy(ob.date[ob.j],tempd);	ob.j++;	break;	}
+					else
+						printf("Wrong choice\n");
+				}
+				f4.seekp(f4.tellp()-sizeof(ob));
+				f4.write((char*)&ob,sizeof(ob));
+				flag=0;
+				break;
+			}
+			f4.read((char*)&ob,sizeof(ob));
+		}
+		if(flag)
+			printf("No record found.\n");
+		f4.close();
+		cout<<"Want to update more records?? (Y/N)??\n";
+		cin>>choice;
+		if(choice=='y'||choice=='Y')
+				continue;
+			else if(choice=='n'||choice=='N')
+				break;
+			else
+				{	printf("Incorrect input. Further updates aborted.\n\n"); break;	}
+	}
+}
+
+void attendance::newm()
+{
+	while(1)
+	{
+		char choice;
+		getdat();
+		save();
+		cout<<"Want to add more members?? (Y/N)\n";
+		cin>>choice;
+		if(choice=='y'||choice=='Y')
+			continue;
+		else if(choice=='n'||choice=='N')
+			break;
+		else
+			{	cout<<"Wrong coice\n"; break; }
+	}
+}
+
+void attendance::end()
+{
+	printf("\nThank you for using. :)\n\n");
+}
+
+void attendance::caditshow()
+{
+	printf("\n\n");
+	int no,flag=1,count;
+	attendance ob;
+	ifstream f5("database.dat",ios::binary);
+	show();
+	printf("Enter member's serial number refering the above attendance list- ");
+	cin>>no;
+	f5.read((char*)&ob,sizeof(ob));
+	while(!f5.eof())
+	{
+		if(no==ob.srno)
+		{
+			cout<<"\n"<<ob.srno<<" "<<left<<setw(30)<<ob.name<<ob.att<<" | "<<ob.ab<<endl;
+			count=ob.j;
+			cout<<"Absent dates- \n";
+			while(count)
+				cout<<ob.date[--count]<<endl;
+			flag=0;
+			break;
+		}
+		f5.read((char*)&ob,sizeof(ob));
+	}
+	if(flag)
+		printf("No such member found\n");
+}
+
+void attendance::name_change()
+{
+	printf("\n\n");
+	int no,flag=1;
+	attendance ob;
+	fstream f6("database.dat",ios::in|ios::out|ios::binary);
+	show();
+	printf("Enter member's serial number refering the above attendance list- ");
+	cin>>no;
+	f6.read((char*)&ob,sizeof(ob));
+	while(!f6.eof())
+	{
+		if(no==ob.srno)
+		{
+			cout<<"\n"<<ob.srno<<" "<<left<<setw(30)<<"Name of member - "<<ob.name<<endl;
+			printf("Enter the new name of member- ");
+			cin.ignore();
+			cin.getline(name,sizeof(name));
+			strcpy(ob.name,name);
+			f6.seekp(f6.tellp()-sizeof(ob));
+			f6.write((char*)&ob,sizeof(ob));
+			flag=0;
+			break;
+		}
+	f6.read((char*)&ob,sizeof(ob));
+	}
+	if(flag)
+		printf("No member found\n");
+	else
+		printf("Changes updated.\n");
+}
+void attendance::mem_delete()
+{
+		ifstream f7("database.dat",ios::in|ios::binary);
+		ofstream f7t("temp.dat",ios::out|ios::binary);
+		attendance ob;
+		int flag=1,no,temp=0;
+		char choice;
+		show();
+		cout<<"Enter the serial number of member reffering the above attendance list\n";
+		cin>>no;
+		while(!f7.eof())
+		{	
+			f7.read((char*)&ob,sizeof(ob));
+			if(temp!=1)
+			{
+			if(no==ob.srno)
+			{	
+				flag=0;
+				cout<<"\n"<<ob.srno<<" "<<left<<setw(30)<<ob.name<<ob.att<<" | "<<ob.ab<<endl;
+				printf("Are you sure you want to delete this member?? (Y/N)\n");
+				cin>>choice;
+				if(choice=='N'||choice=='n')
+						{	
+
+						f7t.write((char*)&ob,sizeof(ob));
+						}
+				else if(choice=='Y'||choice=='y')
+						{ 	temp=1;
+							continue;
+							}
+				}
+
+			}
+			if(ob.srno!=no)
+			{
+			if(temp==1)
+			{
+			ob.srno=ob.srno-1;
+			}
+			f7t.write((char*)&ob,sizeof(ob));
+			}
+			if(x==ob.srno)
+			break;
+
+		}
+		if(flag==1)
+			printf("No record found.\n");
+		f7.close();
+		f7t.close();
+		remove("database.dat");
+		rename("temp.dat","database.dat");
+}